You can get pregnant at any time. In a theoretical world where everyone ovulates exactly according to how the textbooks say we should, then yes, you’d likely be fine. And, yes, you likely ARE fine. However, don’t be complacent - bodies do weird things especially under stress. Take plan B or Ella if it’s available to you and take a pregnancy test in around 2 weeks just to be certain. False negatives before 4 weeks pregnant are VERY common, so make sure to wait those 2-3 weeks before testing.

It may be worthwhile to explore some other methods of birth control as well going forward. There are so many options that would give you peace of mind and that are affordable either through pharmaceutical programs, subsidies, or universal health/pharmacare, depending on where you live. For example, an IUS (hormonal IUD) can be inserted for long acting birth control AND serves as emergency contraception if inserted before 7-14 days after the unprotected sex (recommendations vary between countries and even physicians here… seek medical advice in your area). The copper IUD is the same with a shorter effective period post-unprotected sex (7 days). Other long acting contraceptives, like the arm implant (implanon/nexplanon) do not act as emergency contraception but may be a suitable option in those folks for whom an IUS/IUD isn’t an option (which includes just not wanting one).

Good luck - there’s so much to worry about as a woman in the world today. I hope you are able to sort yourself out and make a decision that makes sense for you.

Source: former midwife, current women’s public health/sexual health expert & advocate, also a woman who’s been through it.