helppp

ok so i had my period last month and a few days after my period my bf rubbed his dick on my vagina but he didnt put it in and for the last werk my boobs have been sore and slight occasional cramping. i broke out last week and i was suposed to get my period 1-2 days ago and i still havent. my last cycle was 25 days and this one is already 27 and i still havent got it. i took a test thismorning and it is negative what do i do