2nd dose of pills

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So I had an abortion about 3 weeks ago. I went to the doctor on Saturday and he said there was some tissue/clots remaining and he gave me a second dose of pills. I took them yesterday and I was bleeding/passing some clots but within the last hour it was a little heavier than usual. Is this normal? It was the first time that I actually filled almost a whole pad within 1-1/2 hours.