More ranting about meds

I'd really like to know why I've had such a hard time falling asleep the last few months. If I don't take either melatonin or Benadryl, I don't get to sleep. (dangerouslysane L-Theanine does not work at all for me. I've tried it).

Does anyone know if it could be caused either by the meds, or by me gaining weight (which I am now thankfully losing)?