These are all common symptoms of anxiety. If you worry all day and stress out your mind...guess what? Your body will be stressed out all day too. Your paranoia and fear is trying to self diagnose. You don't have 5+ medical knowledge under your belt. You have fears, worries, illogical thinking and google or webmd. You don't have a tumour. You have an anxiety disorder.
I'd recommend reading Unlearn your pain by Dr Howard Schubiner. It helped me greatly.