I've been on ortho tri cyclen for 4 months now. The first couple months I had break through bleeding which I expected, the 3rd month everything went back to normal, no break through. Had my period as normal. Here's my issue....I missed a pill due to the flu and doubled up the next day, I did have unprotected sex about 5 days later on the 10th, started my period on the 13th, everything normal. Had unprotected sex on the 20th and 21st. About a week later I began to have pains in my right abdomen and then had a pink and brown mucus only when I wiped. Since then it just been very mild cramping no discharge but my moods have been very up and down and my nipples get sore but only for short periods of time. And the bloating! My god, when I eat I feel soooo full and heavy in the stomach. My question is, should I be concerned about pregnancy or is time to switch birthcontrol?