Do you think these two things are related?

I've been having a problem with pills lately, nothing major, but I take motrin, tylenol, naprosyn, naproxyn sodium (probably spelled wrong, sorry), a muscle relaxant, and another pain reliever. I probably take anywhere from 12-16 pills at a time. I am trying to lose weight, but recently I have found that I am extremely hungry, more so than usual, and I have this constant naseous belly ache. This might be a dumb question, but are the pills and stomach problems related? and if so, do you know why? just opinions. Also, how long do you think I should feel the effects of taking all those pills for?? ( I know it is a problem, and I am in therapy.)