I'm afraid it won't work too. But for me, I'm mostly just afraid that I don't know what to do and that my life is ruined. I understand that I'm doing my best, and that I want to get better, and that this is the most likely thing to help me get better right now, so I'm going to work at going through it diligently and consistently.
My therapist (specializes in TMS) has worked with me extensively on fear this past year, as I was having terrible anxiety. The practice that worked for me was to understand that my fear comes from a younger part of my mind, one that likely viewed the world in a skewed subjective reality that was more black and white than it really is. As such, I will feel that fear of "This will not work. This will be forever." when it's not really representative of reality. The feeling is still real though, and he suggests that I try to empathize with that younger part of my mind, and truly let myself feel the fear (for me this takes the form of crying like a baby usually), and as I'm feeling the fear, I can almost split my mind in 2 and comfort myself, the adult comforting the child inside. I'll wrap myself up tight, hug myself while I cry, and remind myself that it'll be ok as I lean into the emotion. After the emotion is expressed in a cathartic fashion, I'll remind myself of the adult perspective I have now which is more realistic. The idea here as explained by my therapist is that over time, our minds learn not to fear what we've been fearing, because we are exposing ourselves to it (the scary emotions) but nothing bad actually happens. This is exposure therapy, and I find that the things I was once really scared of (e.g. not sleeping enough, not being able to breath because of tight muscles) no longer actually scare me.