First and foremost: reach out to someone. Anyone. Anyone. The silence is lethal.
Cry. Don't hold it in.
Can you go outside? Go for a run? Intense exercise really does help some.

I know how you feel though. I broke down a few days ago and went for a drive. But please be careful if you're driving in a crisis. I almost crashed three times cause I couldn't see from crying and I was angry.

you will make it to the other side, my friend.