Is the chance there?

Hi everyone,

I have a question.. I was on the pill for almost a year and it was always fine until I had some issues and stopped. About 3 weeks ago I got my period and started taking the pill again after a while, but after about a week and a half I forgot the pill once and just took two pills on consecutive evenings. I got stomach pain and then got my period, so I stopped taking it. During my "break" I had sex (when I wasn't bleeding anymore, but the bleeding came back) and my boyfriend came inside a few times.. I don't know if there could be anything going on, I started taking the pill again on Sunday night to finish the pack. But now I feel very nauseous, tired, have a headache and pressure in my lower abdomen. I find it all a bit scary, can someone help me??