You should talk to
a psichiatrist, psychologist. I have been through this type of anxiety a lot of times in my life, even worse than yours. I thought i had aids, als, multiple sclerosis, brain tumor, colon cancer, etc, etc. It is not good for you. i went on medication for a year. One of the best decisions i could take. after medication i still had some worries, but i went through all of them. last one was brain tumor 2 months ago, i had headache for 3 months no stop 24/7.