After i took plan b 4 or so hrs later, a week after that im having a small period. It's heavy enough that i need a pad. It's been about 4 days & it's still going. I also started around the dates AF was due so im not sure if it's the plan b making me bleed or AF. Im just scared it failed & i can be pregnant... i have no symptoms out of the ordinary just the bleeding that makes me wonder.