You sound seriously overwhelmed & overworked! Even as young as you are, ladymacbethadmunsen, I don't know how much longer you can expect to pull it off. I'm unclear, are you continuing in graphic arts or have you switched to psychology? To continue in a field you've decided you're not a fit for would heap so much more stress upon you ...

Please find a way to fulfill your basic biological needs for sound sleep & nutritious food. Is your T asking about these things too?