Hi, I was about 5 days into my first pack of birth control pills when my boyfriend and I dry humped. He was wearing boxers and I was wearing leggings and a lace thong. I know he was at my entrance for most of it. I've felt slightly nautilus occasionally and I had a few lower abdominal pains a few times also. Now, I'm three days into the week designated for my period, and it hasn't started yet. I don't know if it's my body reacting to the pill or if I'm pregnant, thank you.