I am under so much stress right now

Well first because I'm starting high school in two days and I have zero friends and don't know where anything is.
Then there's my horse. I'm still training him to be ridden without trying to kill me or run me into walls.
Then biggest of all. My ex friend. I'm gonna have to see her at school and whatever I've told everyone else I don't if I can take it. I mean last night I was reading my old notebooks with killjoys with her in em and I ended up crying. And I dont cry.
Then there's the fact that I have whiplash from some dipshit rear ending the car. At a red light!
And I havent been able to breathe right. Just the other day I was leading my horse around and I just couldnt breathe all of a sudden. I actually had to get on him and ride him back to the barn and I was right down the road.
I feel really close to a mental breakdown and it's all I can do to not start cutting again. I mean it might make me feel momentarily okay but I'm not going down that road again.

~NightHawk