Just my two cents, but if the melatonin is not working for you, then you don't need it. That is why you are not noticing a difference when you take it.
You might want to try something else to help you sleep. Some people swear by Valerian, have you ever tried it? I had to use an RX for awhile, just to get my body used to sleeping again.
here's all my issues: fibromyalgia, osteoarthritis, pinched nerve in neck, high blood pressure, sleep disorder, Raynaud's disease, food allergies,
("but you don't look sick!")
what I take: three different meds for high blood pressure, vitamins, magnesium and calcium.
**slightly confused, all of the time!**