A life long insomniac, I started taking OTC melatonin tablets over the past month or so to help me sleep. For a while, it worked pretty well. Then, last weekend, I was away from home and forgot to bring the melatonin. I slept horribly that night. I started taking it again as soon as I returned, but I noticed that I wake up multiple times in the night. Oddly, I usually wake up at the same times (2 A.M. and 5–5:30 A.M.). I have been under a lot of stress lately, which may be a contributing factor, but I also wonder if the melatonin is playing a role. Do I just need to let it build up in my system again, or could the problem be a sign of addiction and/or rebound effects? All I want is a good night’s sleep.