Experienced Death Without Dying

If you know anything about anxiety then you know how crazy it feels to have an anxiety attack. To make a long story short I managed to convince myself that I potentially have a brain tumor and am going to die without even going to see a doctor first. I might as well have killed myself at that moment because boy was I feeling dead. Idk man, I suddenly couldn't breathe, couldn't swallow my spit, my throat was hurting, etc. I read that a symptom of brain tumors was not being able to swallow easily and for some reason, at that moment I couldn't do it. Well, while freaking out and parading around google for symptoms and shiz I tried to calm myself down and think about other things. I ended up searching for "symptoms of an anxiety attack" just to clarify. The symptoms checked out which wasn't shocking but along with the symptoms came a definition that stated: anxiety attack- when a person experiences physical and/or mental, stress due to the fear of an event that has a possibility of happening rather than immediate danger. (it was smth like that) But this definition magically made me calm the fuck down, I realized that nothing had even happened yet, hell I was more likely to die from the anxiety attack than from a brain tumor at that moment. So I chilled and came to the conclusion that even if I do have a brain tumor, not all of them are harmful and it's not like I'll just drop dead. Really this situation made me realize 3 things:
1. I need to go to the doctor because them symptoms were a lil too accurate to my current state
2. I need some therapy cause YEESH
3. I definitely have Hypochondriasis
TLDR: I almost suffocated myself because I thought I was going to die. This all happened in around 10 minutes while my teacher was lecturing us on drugs via zoom. Gotta go to the doctor because I might have a brain tumor :/