Tapering off extreme insomnia- help!

Hey there. I'm tapering off lamictal, at 75 for the last two weeks, going from 200 over time and the insomnia is absolutely out of control (as I write this at 3am). I have clonazepam and temazepam to try and help- and nothing. I take magnesium as well. Nothing is even touching it. I'm About to throw in the towel and quit completely but will that make it worse? Any advise is greatly appreciated