Late taking birth control pills - could I be pregnant?

Hello! I am currently on Yasminelle birth control pills. Yesterday, I was seven hours late in taking the pill. Today I had unprotected sex with my other half. I know this may not be relevant as there is sperm in pre-ejaculate but he did not ejaculate in me. I am currently on the second week of my cycle. Although on the pill packet it says that your protection is only jeopardized if you don't take the pill within twelve hours of your usual time, is it possible that I could be pregnant? And, would I be overreacting by phoning my GP tomorrow and requesting the morning after pill?