When I was around 12 or something and got the stomach flu. I didn't sleep the whole night, drove my parents insane, vomited my guts out, cried non stop, screamed, destroyed everything, refused anything, I looked absolutely horrible. My face was completely frighteningly grey, I couldn't walk and fell as I was walking and the stomach flu wouldn't go away because I kept unconsciously making myself vomit, and I was falling apart with explosiveness during the whole thing. All I wanted was a glass of water and it all started >:(
Anyways, the most hilarious part was it took another 7 years of not caring. One night I got out of bed and my thoughts were all just frozen, I felt nothing. Then I felt like I was shot in the gut with nausea, and after 7 years I panicked like I never had before, it was very "triggering" if you want to use that word. Now I've gotten a bit over it but there are small remnants of this old phobia that I hope never arise again. I just can't stand the feeling of nausea, and the longest total meltdown I had was around the times I've felt close to sick, in school or wherever. I will cry and throw a tantrum, beg to go to the nearest doctor just so they can stop it. I was a shaky wreck but I'm far better now.
The other occasion I can think about is every couple months I get a sort of personality crash. I feel like a sociopath you know, I just put on this fake damn mask to fit in with others and it dries out and I discard it feeling like I have no personality then I have to dawn a new one, it's rather horrible. But at the end of a certain period of time I sort of explode because this "mask" personality dies away and I'm left with some internal insecurity that I'm working to get rid of. No idea how it got there tbh.
Sorry this post sounds horrible :L