My boyfriend and I had gotten really into sex this morning. In the beginning we didn't use a condom, but I am on the pill and I take the pill at almost the same time every day. On Saturdays and Sundays I take it a little later than normal. So we put the condom on at a point close to the end and after he came he removed the condom and pressed the tip of his penis on my vulva, It was only for a moment and then we parted ways, but we laid there in bed for a while. I am worried I have an extremely high chance of pregnancy, what should I do?

The beginning of my last menstrual cycle was January 29th, Thank you for any feedback you guys can give me.

Am I overreacting?