Sex help

So I'm usually on the pill, but at the moment I'm taking my 7 day break. Me and my boyfriend had unprotected sex, but when we were drunk. My boyfriend can't really cum whilst he is drunk, and I don't suspect there was any precum either.. We have had unprotected sex before and it has been fine. However I'm just wondering whether you think I should take a morning after pill anyways? However I did also check online and the nhs website said it was 25 pounds, which I think is ridiculous.. Anyways what do you think?