Could I be pregnant?

So I just started my 3rd month on the mini pill and I haven’t missed a day, and my boyfriend and I had sex twice last week and yesterday with a condom, but he didn’t pull out before he came this time. I was supposed to start my period yesterday but I didn’t so now I’m a day late. I have my usual PMS symptoms like tender breasts and pre cramping (which is usual for me). I’m a really anxious person so I’m really scared that my birth control isn’t working or something and it’s stressing me out (I’m 18).