New POTS symptom or stress? in Dysautonomia Discussion Posted July 3 · Report reply On 7/2/2019 at 12:40 AM, KiminOrlando said: Could the calf muscle have been small fiber neuropathy? Could the chest be costochondritis? Look them up and see what you think. Any autoimmune issues? Sorry this is happening. We never know what is real or not. I don't think I have those idk. No autoimmune diseases have been discovered as of yet. Still pretty new in this journey of figuring out what's wrong with me.