Emotionally Broken

I had an emotional breakdown at work today. I don't understand what happened, one minute I was getting ready to hit the gym when I realized I forgot my gym pants then I was crying my eyes out. In all honesty the more I keep trying to pick myself up and keep going the more of these breakdowns I have. The urge to hurt myself is very very strong right now. I don't know if I am exactly suicidal....I am thinking about it though. I haven't been to a psychologist in months and I don't have any support. I don't know if I am going to crack or not. I am scared I will just wake up and not be able to get out of bed again.