Is it normal that,when I'm really scared,I vomit?
It's not uncommon. Plus it's a great way to deter a would be attacker.
I don't know of anyone that does that. But in a way that's pretty cool!
I don't so ummmm no???yes?? U might have acid reflux but that's the only thing I could think of
Don't worry about the slendermen thing. It's an urban legend
Yes that's normal. That is just a nervous reflex.
It is not really normal, how much not normal should be evaluated by a MD.
No, not really but you could look online for so ways to destress, or talk to a therapist or school counselor (if you're still in school, of course).