I can't sleep when I exercise, what can I do?

I started walking and jogging on the treadmill for about an hour a day three weeks ago. I do this some time between the hours of 4pm and 7pm. That night I won't be able to sleep. I try to get to sleep about 9pm and wake up at 5am but I won't be able to fall asleep until 12am to 2am and I'll also wake up 2-3 times during the night before my alarm goes off. If I take a sleeping aid (Tylenol PM) I can fall asleep about 11 to 1am but I still wake up several times at night. I skiped two days on the treadmill last week and I'm able to sleep perfectly. What can I do to sleep better at night and still keep my weight loss plan?-I have one cup of coffee M-F in the morning, two cups now that I can't stay awake at work
-I don't drink any other caffine in the day, including soda
-I have an office job
-I can't change that I get up at 5am
-I am exhausted when I go to bedThanks for any advice you have! :)
Answer:
I use melatonin, you can find it at your natural foods stores and it works like a hot damn! try that.

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You cannot exercise that late in the day and expect to be able to sleep. I would start getting up an hour earlier and working out then. That way the energy return will come in the late morning or early afternoon instead of keeping you awake until all hours of the night.

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