I used to work in cardiac nursing, am a bit paranoid (educated), and the cardiologists would just laugh. They could be from many different things, but the important thing to remember is to not stress the little stuff.
I self diagnosed myself. You know your own body better than anyone else. I had so many skin issues that all improved with the diet. Hundreds of $ and rx’s never helped, so I figured why get a blood test that may have a false negative? This worked not completely or instantly but better than anything else I’ve ever tried. Good luck to you 🙂