TW: disease

i’m really scared that i have some sort of degenerative disease or some kind of awful rare genetic disease. i’m almost 19 and i always hear of people have a relatively normal childhood and then once they get to their late teens or early twenties their bodies suddenly give out and they get diagnosed with these diseases. dealing with all the physical anxiety symptoms i have everyday makes me afraid that it’s not actually anxiety and that it’s a disease instead. especially since earlier this year i dealt with some unexplained health issues, i’m very scared now. any help or reassurance would be amazing