Even though I haven't been able to sleep well either the past few weeks (and normally I have a weird sleeping pattern as well), but a ritual usually helps. As in, doing the same things every night before going to bed. That can be listening to music, getting yourself ready for bed in the same order. And try to go to bed around the same hours, especially during the week. During the weekend, it may vary a bit of course, but a stable sleeping rhythm during the week is very important.
May I ask what kind of meds you are taking? A good substitute for real sleeping pills is melatonin. It comes in all kinds of varieties, but it helps your body create a normal sleeping pattern again. And a big plus side, you don't feel groggy in the morning because it is only a natural add to your body producing melatonin. No weird chemical stuffs.
What is very important as well, as if you wake up in the night and you can't sleep anymore, GET out of bed. Go watch some TV, read a bit or something but get out of your bedroom, so that your body will relate not sleeping to not being in bed, and relate sleeping to being in bed. It is proven that this really can work. Tossing and turning and lying awake doesn't do you any good. So you could try that too. I know it may be frustrating the first couple of nights, but then your body will get used to it (hopefully).
Good luck!
The last 2 nights have been horrible for me. I didn't fall asleep till 3 on Wednesday night because I kept thinking I was hearing things in the garage (it shares a wall with my bedroom). Then last night I had a sleepover and my friends fell asleep really early so I was left laying in my sleeping bag for a couple hours 
But more suggestions would be great too because those definitely don't always work!
Ignore some of the stuff I said earlier.... 
Darn 1 hour editing!! 
