Welcome Coffee
Do you find this sort of thing happening alot to you? I am no doctor so I really can't give you any medical advice but I would suggest talking to your doctor about it. Especially if it happens alot. There are so many things that can contribute to depression. There is a thread at the top of the boards that explains depression, I would suggest reading it, it might help.
Congratulations on the 6 lbs WTG!!! did you lose it quickly, if so that might be why you are so sluggish. A safe healthy weight loss is 1 - 2 lbs a week, I would think any more than that would be putting stress on the body, plus you are under alot of stress being a student, double whammy. What about vitamins, are you taking any ? make sure you aren't robbing your body of any nutrients, drink lots of water, you need fluids and water is the best way to go (noooo not the beer at the frat parties lolol, I remember those days

lol ).
Come and visit us on the daily boards.
Hugs !!!