Hey Lauren!
Try not to worry about sleeping. I know what you're thinking, "yeah - right." I've had some seriously rough nights for the last two weeks also. Someone on here told me that insomnia is very normal for people like us because it's so hard for us to turn our minds off. I finally got some sleep last night - shocker! Anyways, what helped me fall to sleep finally was telling myself over and over that it is ok not to sleep if I can't. Yes you will be tired the next day and feel out of it, but it is ok. Get up and watch tv or read a book or something and try to go back to bed later when you feel more tired. I also read on an insomnia website that the most important thing to remember is to not stay in bed watching the clock and getting more frustrated. If after you go back to bed you still can't sleep, get up and do something again until you're tired enough to back to bed. Do this over and over if you have to. The longer you lay in bed being frustrated, the worse it will get. It also said that by doing this, your body will be more geared up for sleep the next night because you will be more tired. It may take a couple days of doing this, but as long as you keep the attitude that it's ok not to sleep if you can't, sleep will eventually come.
I know that's a long one - sorry! I hope the info helps you feel more at ease when you're laying in bed feeling anxious about not sleeping though. Hang in there! You can do it!