Yes, I have had something very similar to this a several years ago. I was in my last year of college and doing an internship and working full time to boot. Too sum it up I ended up with Stress Induced Sleep Disorder which my doctor prescribed Ativan. The Ativan didn't work so well for me as it had a much more of a sedative effect and I couldnt function during the day. So I quit taking it and tried Tylenol PM and it worked wonders for me. Now when I have trouble sleeping this is what I take or I will just take regular Benadryl over the counter as I sometimes worry about taking too much Tylenol. Anyway, I do have this problem too and have a hard time shutting off my mind of all the things that I have to do or didn't get done or what may be going on in my life at the time. It tends to want to creep up on me too at bedtime and make itself known. If it gets to persistent I would let your doctor know as going without sleep can open the door for other problems.