birth control
"I really love this birth control, because combination pills make me insane emotionally.  I take it every day at the same exact time, so it is extremely effective.  The only thing is, I still get my period, even though you are suppose to take the pills back to back.  I mean, I would still be getting it if I was on the combination, but it would have been nice to not have it.  Oh well, still worth it.  

Do not take the pill at different times.  Even by an hour.  If you can't take the pill at the same exact time, you will probably get pregnant."