I took two plan b pills in january, and i ovulated late around the 3rd of february , and 4 days later im experiencing heavy bleeding and cramps , i cant tell if its my period , like can it come that early because of my hormonal changes?

Plan B bleeding : Yes. Plan B is a hormone medication so it can have effects on ovulation and bleeding. But it does not work 100% of the time You should consider getting HCG level ( may be negligible if fetal demise ) and or ultrasound ( though early on may not show anything). if using more than 1 pad/ tampon every 2 -2.5 hours, severe pain go to ER/ urgent care. https://www.drugs.com/plan-b.ht