Everyone dreams every night whether they remember them or not. We have to dream or we die, literally. They happen during REM sleep.

Curious that you believe you are having affects from dreams yet don't remember them. I have effects from meds when I take them for insomnia or colds, etc. I can't stand cold pills as I get all messed up almost worst than the cold makes me. I would talk to your doctor rather than worry about your dreams. I don't think dreams mess with your "body" that way, I think only meds can.