Dear Welome to HCM We understand your concerns I went through your description and I understand the depth of the problem. Your doctors suggested that there is nothing to worry and gave you some medications. Even then you are not cured fully. I suggest you understand your problem fist. Diarrhea is a problem if it causes sever water loss from body. Means atleast 7 to 8 times a day with watery stool. If it is less and infrequent, sincerely nothing to worry. All other symptoms including this one is associated with anxiety and fear of unknown. Weight gain can be associated with a hormon called cortizol. Anxiety increases cortizol production. This cortizol is also linked with palpitation, body and muscle ache, sometimes diarrhea etc. But you don t have to worry. Confirm yourself that your problem is unnecessary anxiety. Then consult a psychologist for further advice. Drink plenty of water and eat lot of fruits. Hope this answers your query. Available for further clarification. Get well soon.