Plan b while on pill?

Okay so. I’ve been on bc since last august. Been taking the pill every day at 1pm. There was a break from taking the pill around November/December because my doctor hadn’t approved the refill. Got back to it in January. I was doing good at taking it at 1pm but there have been a handful of times where I’d forget and take it up to 3-4 hours late. But continued to take it 1pm the next days. But I never skipped a day. Fast forward to this past week, still taking it on time (1pm). Except for I think it was last Monday on Jan31st. Work got too busy and I ended up taking it around 3 something. Tuesday-Friday I continued back at 1pm.

Saturday morning at around 3-7am, (feb 5) I had unprotected sex, we were both completely shitfaced and at first it was difficult for him to get up, we both had to sober up a bit and finally we were good. I started my period too in the middle of it so I felt more wet down there, but I wasn’t sure if it was my period gushing or if he came… i asked him if he did and he says he doesn't think so and is unsure. But i need certainty. So, my question is. Am i good with just taking the pill even though my times haven't been very consistent, or should i take a plan B for some sort of extra protection??

Please, if anybody could get back to me ASAP. I would greatly appreciate it.