Re: Work advice needed
I would not go so far as that. I'm assuming you're talking about a health-related research position, or a science one? Those people are VERY familiar about what an overloaded student's life is like. I suggest you talk to your boss directly about the situation and explain to her that you took on way more than you feel was HEALTHY for you to take on. (i.e. that you are barely getting any sleep).
Rather than emphasize on how you can't handle it, ask for suggestions on how to minimize your time on the research and get more out of it, so that you can take care of your studies too. If the boss is not understanding about the school work, then its in your best interest to drop the position and find someone who is more understanding. You fire them. Don't let them fire you.