Helpppp

So it’s cycle day number 33 and I’m way passed fertile. In fact, two days late actually about 4 to 5 days ago my bf and I had sex and I’m pretty sure we are good from that time because he pulled out and didn’t come inside the condom or me. Now flash forward to today where I am two days late prob because of stress and work it happens pretty often.. we had sex today and he pulled out and came in the condom but I didn’t know and told him to keep going and later on realized the condom was like halfway on his penis with some cum around it. So I most likely got some in me now. I just don’t know if I’m at any risk of becoming pregnant because I’ve been feeling light cramping and feel like my period is coming soon and if that’s the case I’m surely am not fertile. Do I have anything to worry about ? Should I take plan b to be sure ?