Is this OCD?

I'm not sure if this is OCD but i can't really come up with an answer with why i do these things.

Alright, i'm a 16 yr old girl and i think i've been doing this since i was 14 or maybe 13.
I think it's just compusive things. I feel like i have to do them and if i don't i tend to shake and get really bad anxiety.
I get really irritated and end up doing it anyway. I'm not sure if this is OCD cause i do really odd weird things.
Sooo, the things i do are stupid but i really have to do them.
-When someone burps, sneezes, coughs, on the tv, on the phone, in real life etc i have to blow it away. It really grosses me out and makes me sooo mad. Even if it sounded like something like that, i still would have to blow and get all of that away from me. It feels like it takes my breath away but i think it's just me sub-consiously reacting to it.
Everyone gets mad at me when i do it.
-When i get a certain thought in my head to do something once more, i have to do it. Most of the time it's things like washing my hair, brushing my teeth, washing my hands, writing something over again. It's actually anything. If i think about doing something twice i have to do it.
-I can't stand in front of the toilet. I don't know why. But i get really irritated and feel kind of freaked out. Like i have to get out of the way or something bad is going to happen.
-i can't have anything under my fingernails.

Gosh, it's just a whole lot of things. It's even hard for me to watch certain tv shows and movies.
I think i have some kind of anxiety problem. Even today i freaked out and was crying for hours about the mayan prophecy thing. The whole thing about the world ending in 2012. I don't even know if i believe it.

Does this sound like OCD? If not, what could it be?