I don't know what I was thinking

I started college a few weeks ago. I work every single weekend as well as every Thursday evening. I have school every single weekday. I have severe anxiety. And I have no idea how I'm going to keep doing this. I am EXHAUSTED. I almost never have any free time and I'm always in pain and stressed out. Always. Every single day. I know others have it so much worse but still, to say I'm overwhelmed and exhausted would be a huge understatement. Recently my job has gotten harder, a lot harder, my boss used to be wonderful and now honestly is a massive bitch that is IMPOSSIBLE to please and blames me for the shortcomings of my coworker because they're very close and she doesn't have the balls to fire her. When I'm not being snapped at and working my ass off at work, I am either at school, sleeping or attempting to study. I have absolutely no idea how to do this. I have no time to destress. I need some advice. I need some help.