Help please

It’s cycle day 35 and my period is four days late. My boyfriend and I had protected sex a week ago today and I wasn’t really worried about it because he didn’t even cum inside the condom when he was in me and we checked it multiple times. But when my period was two days late we had sex with a condom but he came and kept going and it was like halfway on and some of it may have gotten in me. It’s Teo days later since that’s happened and I tested for pregnancy because a week ago today we had sex the first time and it was negative. Should I be worried about the time we did it two days ago when I was late. Today will be the third day and he wants me to take a plan b but I’m already late 4 days. What should I do ?