Hey Karina,
I'm sorry you are having some issues with convincing yourself. Please know that ALL OF US are going thru the same thing. I hope you don't mind me saying this, but from the outside looking in (it's always easier seeing other's issues), I see 2 things that may be contributing.
1) Fears-it seems you are fearing that you may not have TMS. I don't know your medical history, so I can't tell you if you do or don't. I DO KNOW in my case, if I were to just look at an MRI, my case would be definitely all physical. See, I don't have any facets from C-2 to the top of the thoracic spine. They were cut out. After my original surgery, the Neurosurgeon and Doctors said I may have trouble just walking. If I get hit in the back of the neck, I will be paralyzed for life, etc., etc.They were wrong!! I've been told it all....you have degenerative disc disease, you have bone spurs, you have this, that, and all the other things. Even though I didn't know exactly what was going on, I have always maintained that my pain was due to stress and an overactive Nervous System. I could just tell. I have had too many experiences telling me I was stronger that what I was led to believe. For examples, I fell down my stairs (10) feet slipped out in front of me, broken dishes, came crashing down, and I got up and walked away. This has happened 3 times in the past 2 years. Exactly 1 year ago, a brand new driver swerved over 2 lanes, and hit me head on. It totaled my truck, airbags went off, car catches on fire, and my wife was knocked unconscious. I kicked the doors open and pulled my wife out to safety. I was sore for about a week. My chronic pain overrode my immediate/acute pain. Meaning, my chronic pains were more important to me than an acute injury (if that makes sense). I 'm not saying this to be boastful. I am making the point that our bodies (not just mine) are far more resilient than we give it credit. I have a feeling your may be, as well.
2) It seems as if you are just thinking about all of this too much. We all have that inner chatter that plays head games with us. This can make us believe things that are not necessarily true, and it can cause depression or anxieties if we allow it. I would suggest just letting everything go. Don't worry about anything. What's the worse that can happen? Don't play head games with yourself. Nothing is as important as your own health (that includes mental/emotional, as well). If you are spiritual, just let it be in the hands of fate or GOD or whatever your beliefs may be. Personally, I am a Christian, and it feels GREAT to let GOD have my problems when they are too overwhelming. This seems to give me back the control.
Anyway, just let it all go for a while and relax, just doing nothing, and you will be in a great place.