please answer!! (nurses if possible)

Samantha
 I took my last active pill yesterday, and I always take my pills within a 20 minute window each day in the morning. And I haven't taken any medication to affect them. But for about a week I've had lower abdominal pain, maybe my ovaries? Just a dull ache, but one day for a couple hours it was a little more intense, but just dull ever since. About a week ago I did have sex that caused me some pain, but I said nothing about, and a few days before that I had sex and the position hurt me a lot, but kept going. Should I be worried about pregnancy? I usually get my period the 3rd of my nonactive pills. But I still worry. Please help!!