Very true. Insomnia and anxiety usually go hand in hand. If this is new to you, and lasts longer than 2 weeks, see a doctor.
If your anxiety is under control, your stress level is down, and you still can't sleep, perhaps this is just your normal pattern. I only sleep 4 to 5 hours a night, since I was a kid, and it hasn't hampered my progress or killed me yet. Look at it this way, you can get a lot accomplished while other people are sleeping.