On going nausea

The past week, I have been getting really bad nausea, and headaches. When I think the nausea is from being hungry... I eat and it's still there. My period just ended, so I'm not pregnant, also being not sexually active. I went on a pill called Diane about 11 days ago, to improve my acne, and my mum thinks it might be from that and wants me to stop taking it, but I want to help my skin. Has anyone been on this pill? Had side effects? Or been on another pill and had the same thing? Or think it could be from something else?