Patient: So i was on vacation march 13-23 and i didn’t take my birth control regularly (i know i missed a full day on either the 19th or 20th) but then i started taking my bc regularly again for about 6/7 days. i had unprotected sex on friday and saturday night and took plan b sunday morning just to be safe. i also started this pack of birth control early (on friday instead of sunday). i usually get my period on tuesday morning but i haven’t gotten it yet, should i be concerned or is it probably just the plan b/messed up birth control making me late?