What is going on?

Okay so my husband and I are waiting to have a baby. I'm currently on Ortho Tri-Cyclen (the pill) and he goes out of town Monday through Friday for work. Last week, my mom had me stay over for two days and I forgot my pill. This was Thursday and friday. When I took my pill on Saturday and realized I had missed two, I doubled up. I picked him up from the office on Friday and (of course) we had unprotected sex more than once. But NOWWWWW I'm peeing A LOT and I'm having very sharp pains in my lower abdominal area, right around my uterus... what could be the cause?