I have mental health problems as well as SFN and like you, I thought it might be all in my head. What happened to you was a form of medical gaslighting. Under any circumstances, the physical must be ruled out before mental health becomes a factor. I actually reported my PCP to the state medical board when something similar happened to me. In my case, every single test I had came back normal which is pretty typical. Remember you know you better than anybody else. Trust your gut.