Yeah, you're in a new environment and it takes a little time to adjust. I've had a lot of sleeping issues myself, and something that has worked for me was getting a sleeping mask.
Getting to bed, and getting out of it the same time every day will help. Even if you're just laying there trying to sleep - eventually the routine will set in.
Stay away from caffeine and eating a healthy diet will also help.
Drinking chamomile tea can help.
Getting something like ZzzQuil might be helpful until you get back onto a good sleeping routine.
Meditation help too - as it helps relieve stress.
Good luck.
Thank you for your comment. A lot more helpful then others! I'm a massive fan of green tea so thats usually my bed time drink, I'm on the rowing team as well and we train 7 days a week but even with this I can never sleep. A healthy diet is all I have apart from the odd sugary snack here and there, I shall have a look at the Zzzzquil, thank you very much