I've been on it for several years, when I first started it I had the hangover feeling, but now I don't. But I don't have migrants or anything like that. Sounds like it could be a nerological complication. My vote is that if its too uncomfortable don't take it. There are a lot of thing you can take for sleep. Short term meletoni use can help you reset your sleep, and benadryl and other herbal medications can also be effective. Sleep should be comfortable, so I say just find something that works for you.