Withdrawal bleeding after stopping hormonal birth control it’s to be expected. Any time you miss 3 pills in a row (be it because you are on the placebo/sugar pills of the pack or if you did so by mistake) the hormones drop, and you should expect a withdrawal bleed. You can now get pregnant if you ovulate and obviously if you stop taking birth control. It’s no big deal unless it is really heavy or goes on longer than 7 days, in that case, visit your MD or closest ER to get professional advice asap. You can read more about how stopping hormonal birth control affects your menstruation here.