Daisy (Xmas Day spoilers)

Just in case some ppl haven’t seen Xmas Day ep yet!

So my husband guessed Daisy getting pregnant from the Daniel encounter, and I said she was smarter than that. Ha. But I can’t quite figure out why a smart young woman with easy access to the next day pill wouldn’t have - knowing bc hadn’t been used, and having been rejected by the man she had sex with - just used it. Easy peasy.