50 mgs of Benedryl will cause Brain fog as well.......you shouldn't be taking that for sleeping problems.
Try something more natural like melatonin.....valerian...etc.
I don't know what time you get home from work, but I get home about 3:00 in the afternoon and I know if *I* take a nap at that time of day, I can't sleep when I go to bed either. Hard as it is, I have to force myself to keep going until bed time in order to be able to get to sleep.
I'm sorry, I don't recall for sure, if you posted labs -- blame it on the thyroid brain fog - but it seems like you did. Have you been diagnosed with a thyroid issue?