June 16, we sort of had sex, we were just fooling around and I went inside her but not all the way (about half way inside) for about 5-10 seconds, I'm pretty sure I pre-came on her vagina. Her last period that she had gotten was around June 1. We were afraid that she was going to be pregnant so we took the pill (Next choice one dose) on June 18. After 4 hours, she began feeling drowsy and her stomach hurts... After a few days (~5 days) shes been having signs of headaches, stomach grumbles, fatigue, nausea/feeling like throwing up. Its now June 21 and her period usually comes around the 26th of each month but last month's came late. Are these signs of pregnancy?, or are these side effects from the pill?