Welcome to SR! I have to admit, I've never actually heard of anyone becoming addicted to using an OTC sleep aid here and there. I myself have always had sleep issues. Lately I've been using Melatonin - it helps to regulate the chemicals that help us sleep at night and wake during the day. It's natural and already produced by our bodies, but the supplement helps to induce the sleep/wake onset at regular intervals. Maybe it's something you might look into if you're still having trouble.
en.m.wikipedia.org/wiki/Melatonin - Just some info on it. Good luck!