Periods after the pill

Hi all I have 7 month old baby and me and my husband had sex earlier this month and were unsure if the condom broke. So decided to take the pill. We had to go the pharmacy and fill in a form and get it. I don't drive and we had few things happening so couldn't go and get the pill for 2 days.

Third day we went in and got the pill and I had it.

My periods weren't due for more than 2 weeks,20 days atleast. But I got my periods 10 days earlier. Had it for 3 to 4 days. And stopped. Now after 4 days again I'm bleeding fresh,Like a full blown period. I can see clots which I don't usually.

Anything worrying??