Sex in the first day or two after a period ends is a lower risk time in most cycles, because ovulation is usually still a week or more away and no egg has been released. Lower risk is not the same as no risk, especially if your cycles are short or irregular, since a shorter cycle brings ovulation forward and sperm can survive several days in the reproductive tract. Emergency contraception works better the sooner it is taken, so this decision is time sensitive.
Next Steps
If your cycles are short, under about 26 days, or irregular, taking emergency contraception now is the safer choice. If your cycles are consistently 28 days or longer, you may reasonably wait and simply take a
pregnancy test if your next period is more than a week late.
Health Tips
Emergency contraception is not for regular use. If you are sexually active without a plan, please discuss a regular contraceptive method with a gynaecologist.