Should I take morning after pill?? Condom slipped

So I was having sex with my boyfriend, we usead a condom and lots of lube but as things got rough in like 10 minutes or more, the condom started to slip off. We stopped before it was completely off but it was like ⅓ or ½ off his penis shaft. He did not cum and we usead a baby wipe on him before we put on the condom. Should I take a plan B pill?? I am not on any other bc, we only use condoms :/ I counted my fertile days and they're going on at the moment