birth control
"You body does take time to adjust to it. The first time I took it, I had it for 6-7 months and felt nauseous right after taking it and would get horrible headaches. I forgot to refill the prescription so I was back on it a month later. And three months after that I'm still experiencing nausea and headaches, but now I have light spotting a couple days before my period, and it doesn't start until 1-3 days after the sugar pills. The only upside, is no pregnancy and it's cheap!"