PLEASE HELP!! BIRTH CONTROL

Okay, so me and my bf have decided that I should start taking BCP because we feel that condoms kinda ruin the moment. So I went to my local GP to consult about it and he said it was a good idea and gave me the prescription. I've been on the pill for a week now, which means that it's safe you have unprotected sex; since it's the 7th day being on the pill. But when I was about to take the pill for the first time, I didn't stop to look at the back of the pill, not knowing that you have to start at the blue line. So I just opened a pill and when I had turned around to take the pill out of the package, I noticed the blue part and decided to wait till the actual start day that the blue line says. ( am I making sense?) eg. The blue line starts on a Saturday so I decided to wait till Saturday to take the pill. But I had already opened one pill. I kept it in the package deciding that I would take the first opened pill the next day. So what I need help with is, am I gonna get preganant because I opened a pill and didn't take it straight away? Instead waiting a couple of days to take it? PLEASE HELP ME!!