Possible help with sleep

Long time quitter, but new to this info. I had trouble sleeping before my quit just over 8 years ago (smoked over 25 years) and it (sleeping) has been a problem since I think around 1994, I was told to get Melatonin 3mg and that would work. I went to the big box store and got some 3mg Melatonin and it did nothing. That was years ago, after working at a health food place I learned that there are differences in supplements. Tired of taking all the meds to sleep and from learning sleep med in school I decided to give it another go because our bodies naturally make it, just less as we age. Went to the local health food store, got some FIVE mg Melatonin (PM me if you want to know what brand I got, it really wasn't that expensive) and by golly,smoking cessation, it knocked me on my behind! I take 2-4 .5mg x a n a x per day for my heart and it just wasn't cutting it for helping me to sleep, can't believe how sleepy I got with the 5mg Melatonin,quit smoking now, feels great to be this relaxed!Disclaimer: I am not a doctor nor do I play one on TV. As with any and all medications, check with your doctor that is usually paid off by the FDA before you harm yourself or spend any money that the FDA cannot get their hands on.