I have been on that hospital situation a few times before, alone just like you and yes it can be frightetning. To the point that one day I gave up and said to myself " If I am going to die here, well , let it be. " -- It was actually liberating, because the fear went away. It was like telling the symptoms " you want to mess me up? Common do it." That was when I realized that this was not going to kill me. Like you I also have a heart condition that the doctors told me that is not dangerous now but I have to monitor every few years, so I know the protocol of all those tests. The funny thing is that no cardiologist believe that stress alone can do any of this, but I read a few good books written by other doctor that bring forward evidence that stress directly affect our hearts. Most cardiologist wont accept it because the stress lowering methods does not sell statins, which are a really big business for big pharma.
The issues that are coming in the journaling are to be felt in a safe enviroment, and some others to just be taken out loud when they have been repressed. You dont have to do anything else. The thing is to get to the full recognition of the mechanism of tms. When you face an old fear or sadness, and when you realize what it did to you and what it does now, you have the connection. For example, you face an episode of rejection when you were a child. You re-live the moment and then feel again that someone neglected or rejected you. That is your inner child in your subconcious which is feeling it, and now you can consciously feel it again but this time you know you are safe. You now can analyze that maybe it was just your perception of rejection at that moment or that your parents were not as good as communicating as you wanted them to be. Now you can soothe your inner child yourself, and tell her that you are ok now and that you are safe, and that you are going to love yourself and not allow yourself to feel that rejection again. Now your brain have no power to activate that pain that was coming because of that particular feeling of rejection, because you have faced it and neutralized the fear and sadness and the rage. You faced what your brain was trying to shield you from, so there is no point in bringing that pain again. The thing is that,.. you probably dont have just a single incident in your childhood and development, but a lot of them. And your perception of how you were being treated is what stored that feeling in your subconcious. You have to learn to let things go, because mostly what will activate these things now that you are an adult, is your personality, which is conscious all the time.
I suggest that you continue the program where you left off and continue journaling. Journaling is to take things out of you. Do not pay attention to your grammar when journaling. Just write what comes out of your mind and dont try to push it into a particular direction. This will help for you to get out what is bothering you at the moment, which is most of the times what triggers the episode. Sometimes your past will come to your mind as well, because when we experience during any day a "shadow" of a negative feeling we had before under a particular situation, it activates the tms mechanism. It can be something that happened 20 minutes or 20 years ago. That is irrelevant. The idea is to recognize where it came from and to know that after facing it, it is not necessary to keep considering the situation or bad feeling that came because of that situation.
Regarding my healing, most of my healing have not relapsed, at least not to the point of before, where it will completely cripple me. Now I can recognize when a pain or sympton is tms, and that not always take the pain away, but it takes the ANXIETY away, which is what makes the pain feel 10 times worst than what it really is. After some time of knowing where it comes from and ignoring it, it goes away. The funny thing is that the brain immediately try to bring other symptoms and it is almost a joke. It is like a child trying to play a trick on you. I do get certain light symptoms, but now I stop what would otherwise be a very bad episode in its tracks by using the relaxation and recognition methods.
Most important,.. REMEMBER TO BREATH. When people get anxious, the first thing that happens is that the muscles of the neck, back and chest spasm, and people stop breathing properly,which makes them feel like they are going to die, which brings more ANXIETY, which again brings a bigger muscle spams, high blood pressure>>> ad nauseum, and the next thing is that you provoked yourself a heart related episode. This can happen in people that have no heart conditions at all. Breath deeply and slowly. There is a book( people is tired of me recommending it), that is called the genie within --google it--, and it have specific exercises to relax yourself into alpha mode and from there it is easier to reprogram your subconcious and relax your muscles. I highly reccommend it as part of your healing program. Many people here recommend "Unlearn your pain" , but I have not read it so I can not say how good it is. I hope all this help you in some way. Keep doing your journaling, relax yourself by the method that better suits you, and from that relaxation reconsider all these points. I am sure they will effect a positive change in you.