Normal after plan b?

I’ve taken it before but this is new this time around, started bleeding 3 day’s after taking it (ovulation) filled about 2 pads, been wearing pads every day till now have changed my pads, every 3 hours or more. Very badly cramping right now. Blood was dark normal, looked more like clots, but everytime I use bathroom toiled water is red. Feeling a lot of pain in pressure on utters and my anus. Is this normal or should I be worried?

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