Ambien CR was ok for me and better than anything else on the market (not over the counter). I switched back to Ambien, actually there is a generic form now and I take 10 mg. I did not have problems with drowsiness if I got more than 5-6 hours of sleep, but that's me.
I know people who have used Ambien CR or Ambien and have had success establishing a sleep pattern, so I think it's worth a shot.
Something I tried over the counter that worked occasionally was Goody's PM.
Good luck, insomnia is our shared curse, but don't ever give up trying something to get a good night's sleep. If you can just get into a pattern, it can make all the difference in the world.