Plan b??

So on September 4th I had missed a birth control pill for that whole day and I didn’t take that missed pill until around 5am today along with the pill I needed to take on September 5th which I took 6 hours late. So I took 2 pills in one night. And I just took the pill for today (September 6th) on time now.

But me and my boyfriend had sex without using a condom on the 5th (yesterday) but he didn’t finish inside of me and I need to know, do I need to buy a Plan b or will I not get pregnant? Am I protected? Thank you!