Am I Pregnant? Help!

So about two weeks ago my boyfriend finished inside of me. I am on birth control, but it is only 91% effective. I do not start my period for a couple more days, but I think I possibly might be having pregnancy symptoms. With my birth control, I control when my period starts/stops (on a schedule) but I starts when I take mine out every 3 weeks. I NEVER spot or have cramps until the day I start my period, but for the last week I have been doing both everyday! Also, I never get breakouts and am breaking out badly on my chin which I think is hormonal. Do you think I am pregnant?

I am taking a test Monday but just wanted to see what others think!