Period started on 22/6 &ended on 28/6.had rough sex on 30/6,he came outside&i took levonorgestrel 0.75mg(emergency pill) same day.had major mood swings,today was supposedly to be first day in my ovulation window &i found bleeding &cramps?pregnancy?

The combination of the withdrawal to the hormones in an "emergency pill" along with the drop in estrogen exaggerated by mid-30's extra-stimulation of the ovary necessary for ovulation, allows for withdrawal bleeding plus pre-ovulatory drop in estrogen to elicit cramps as well as bleeding. If your period is delayed, wait another week, and obtain a serum HCG test to be certain.