Should I take it?

So lastnight me and my Ex had sex.

We didn’t use a condom the first time as he came to fast and pulled out he then put a condom on and we had sex again. We had sex a total for 3 times. The first was unprotected but he pulled out and the other 2 he wore a condom and still pulled out. Should I take plan b? I’m not on birth control or anything and I’m not too worried but I don’t want to be pregnant.

Any thoughts help!