You ARE strong, you are working 12hr and taking a class. Feeling the way you do this is a Major undertaking. I would suggest talking to the T and the pdoc re: meds/thier perception.
Could you toss in one hour of walking/cycling/gym/yoga/movie/total distraction a day? Half an hour?
It sounds very Normal for you to have anxiety, fears, etal given your current situation.
You are not in pieces. Remember that your internal experience is just that until you chose to share your feelings.