First of all, you are none of those things because werewolves and vampires do not exist, and you can only be a witch if you choose to be one.
The feelings you get in uncomfortable situations are probably due to something called 'sensory overload'. You can learn more about that and put strategies in place to deal with various situations.
No-one is out to get you. It's part of the sensory overload I mentioned above. If you think your feelings and thoughts are becoming uncontrollable, then you must talk to an adult about them.
None of this has anything to do with supernatural causes. I promise.