Hi and welcome to PC ...I use to have all the same worries and THEN some that you have...the health stuff and all..I went to the doctors a lot from my teen years on sad but true....I do not fear this stuff anymore but do get tense over new meds like a new antibiotic and all....I do exercise a LOT that helps..Also a good book to check out is
The Anxiety and Panic Workbook...A therapist would help too. Best of luck