broken condom

Lilly
HELP IM SCARED 
I'm about 15 days over due on my period and when me and my boyfriend were having sex the condom broke but he pulled out a couple second before he came. I took plan B the next day because I was scared out of my mind. But before this, about a week after my period ended, we had unprotected. But only for a little, like maybe 40 second all together (plus switching positions) and then we used a condom and it didn't break and he pulled out before he came in it, because I'm strict. Can I be pregnant? Or is all this stress delaying my period even more?! 
Now writing this it doesn't seem that bad, but if you were in my shoes you would see the horror in getting pregnant.