Could I be pregnant?!?!?!

Okay so, I started the pill about 3 weeks ago but I wasn't really taking it at the exact same time every day! I was taking it between 8 and 9am, and once or twice I would have forgotten so I took it in the afternoon! Me and my boyfriend had unprotected sex twice but only for a few minuets as we both got a wee bit scared, he didn't cum in me but may have had the smallest amount of pre-cum! I have been moved to a new pill by my doctor which is used more for contraception and I started in the section which I think your meant to start your period! My period is not due for another 5 days according to <a href="">eve</a>, but I have tender breasts and am slightly bloated and experiencing slight cramping! I'm probably just being paranoid but I'm still a wee bit anxious!! Please can someone help me out hahaha 💕💕