Honey,
There is always a chance of pregnancy when you have unprotected sex. Since you were on the pill I doubt that you are pregnant. I was on orthro tri cyclen for 4 years and I never got pregnant while on the pill. The pill prevents you from ovulating and it thickens the cervical mucus to make it difficult for sperm to pass through. Now if you are pregnant, it takes a fertilzed egg 7 to 12 days to travel down the fallopian tube and implant itself to the uterus. When implantation occurs is when your body starts detecting the pregnancy, So you can take a home pregnancy 14 days after possible conception. Since you were on the pill again I don't think you are pregnant. I'm glad to hear that you are on the pill, but you still need to use condoms to protect against STD'. Let us all know how you are doing.
Hoping for the best,
Love, Falon