Should I take plan B?

Normally, I am more careful.

Anyway, last night around 10:00pm me and my boyfriend had sex. I am on birth control and we do not use condoms. Yesterday night, I took my last pill on the period week, so I am pretty much finished with my period (besides some extremely light spotting this morning which usually happens for a day or two). He did Not cum in me, he did pull out.

The thing is, I am on antibiotics. My doctor said that it would not stop the pill from working but it could decrease its effectiveness. Now I am worried! I do not want to get pregnant.

We never have sex with a condom and so I didn’t think anything of it until after. Then my boyfriend just said “if it’s not important to you, it’s not important to me. I guess we’ll see”. This was slightly upsetting. Should I take it?