I am sorry you are struggling and can relate to both the mental and physical aspects. I have changing feelings too and if I went to the doctor for every new symptom I would be there weekly. I worry that one day I will think it is my rsd or pn condition and it be something else. As my condition has gone on things have changed in how I feel. For example I have developed severe burning in the last year or so where I feel on fire and before I had times but not so consistent.
I also live in fear of more things happening physically. I also worry about environment issues, people bumping in to me, I could go on. I have been to therapy and done things such as biofeedback to help and I was going to suggest similar for you. Also therapy for you and your significant other because chronic conditions impact both sides and communication I feel is important.