I think I would go back to taking the meds correctly, see if that makes a difference and maybe even go back to the doctor who prescribed them, tell him the changes in your lifestyle, see if there's anything the two of you can think to do.

If you aren't working with your psychologist, I'd try to find a different therapist or way of doing therapy that worked to support myself better.

You mentioned your partner getting you out of the situatuion with your mother and grandfather but then they're not mentioned again in your story; are they still there and of any help? Friends?

I would start on the 3 of 4 semesters, there's time for something to break with the financing? Things change constantly, maybe there will be scholarships or other monies not available or known about now for the final semester. As much as possible, I would put one foot in front of the other and you know school has been "helpful" to you, a stabilizing influence for you? Use that "habit" to help center you some?