It seems that you’re too much anxious about your study which is interfering in your sleep. I also experienced same situation while at university. At university, it was fun chatting with mates, going out etc. but when assignments deadline are nearer here comes nightmare, some nights few hours sleep whereas most of the nights no sleep at all. Next day at work, mentally sleep but physically awake which was the worst situation I ever had.
If you’re too much serious about study, than please take it easy and be the best time planner so that you can cover all tasks in time. Once you have covered all the required tasks in time, you can have a sigh of relief which will bring you a sound sleep. Being fair and frank, I was not a good time planner. I always left things to do for last minute which took my sleep away as yours. Later realised, such circumstances would have avoided being a good time planner.
If you think none of the reasons listed on this thread applies to you at this moment than I would highly recommend you to see your GP.
Wish you a good sleep!!!
Edited by Pokhrel, 02 November 2007 - 08:01 PM.