Tend to have trouble sleeping often and feel fatigued at work the next day.working part time doesn't help it seems.safe over counter sleeping pill?

Yes.: Most over the counter sleeping aids have Benadryl (diphenhydramine) in them. Some have herbs like valerian root and yes, they are safe . However, you seem to be having chronic insomnia so you may want to explore why so you can treat the cause. Sleep hygiene will help. Go to sleep at the same time time, avoid caffeinated drinks, eat a balance diet, moderate exercise, take time off to relax.