... Could I be pregnant?

I'm slightly afraid, since a couple days before we had sex I had missed my pills by an hour or two. I took the pills on time three days after the missed ones , then had sex on the fourth day. We used condoms , and we had sex the following days as well. ( used condoms all those times, and pills taken at right times ) It was actually my first time ever having sex.

I have been taking Orsythia for three months, but I was afraid since I usually get spotting on about the last two days of the pink pills and start my period on the 3rd day of the blue pills. However tomorrow is going to be the fourth blue pill and I have had no spotting or my period.
I should also add that we had sex on about the 14th and 15th day of my cycle.

Could I be pregnant?