Struggling with a Mental Breakdown

I had a mental breakdown last night over a simple miscommunication between me and my partner. I just seem to say things that make the situations worse and worse when I just need to end the argument cause I'm over stressed. last night I didn't know I was physically punching myself when I was trying to stop myself from talking. now my husband's mad cause he thinks I was trying to get a bruise so I can blame it on him (obviously not my goal, i was just trying to knock some sense into myself). I feel so insane right now, I don't want to hurt myself anymore, i quit that shit close to a decade ago. I kinda want to go to a hospital but I have no insurance and I have to take care of my child... more or less just need some kind words today.