Hi mosmer
You sound like where I'm at in my life right now. I can't deal very well with the stress that's going on. I'd keep with the therapy unless/until you feel it's not helping or perhaps feel you might want to try a different therapist.
I would make an appointment with a psychiatrist to see if meds can also help you right NOW.
It sounds like your job causes you lots of stress, among other things. Do you think if you tried a different job, something you think would not make you feel so much stress, would help? Or if you don't have to work right now, quit your job and just focus on school. That's stressful enough.
We all have different abilities in dealing with stress. My threshold for stress is very low. I don't blame myself for that anymore - I used to. I respect my limitations and do the best I can.