pls calm me down

I had my blood taken (cbc, sed rate, metabolic panel) and also an ultrasound of my whole upper amdomen and everything came back perfectly normal. The doc said eveeything looks great (in both blood and ultrasound) however im a hypochondriac and still convince myself that i may have something scary going on even after the most important test done (blood test). Im 18 years old and have a irrational fear of having brain C (not going to say it) but i couldnt right? I also had xrays of my back and neck/head done last summer for a chiropractor and everything was normal too (apart from scoliosis lol. The blood test would’ve showed some abnormalities if i had something scary right? I know i sound ridiculous but i just keep scaring myself because i keep getting pains on the right upper bavk yhat kind of radiate into my neck and righr side of head and its so annoying and frustrating :(