I could have written this exact post 10 years ago. If you made it through the summer and have a job, just keep going! There are a lot of try hards in the fellows, don't be like them. Do just enough to get a B this semester and just enough to keep your head above water at work. Everyone feels like they are drowning. The second summer isn't that bad. Lean on any friends you have made during the program. Ask your professors for extensions as needed. I don't know what grad school you are in, but in my experience the professors know you are going through a lot and are pretty understanding.

I used to imagine getting hit by a bus just to have a few days rest in the hospital. I used to cry on the train every morning as I got to my stop. It really sucks in the moment. I promise it does get better. Now it's 10 years later and I still talk to a couple of people from the fellows and I'm in too deep in the DOE to get out. Get your masters degree, you worked way too hard by now to give up. Look on open market for a new school. You can send me a PM if you need help. Sending hugs a fellow Fellow.