i last had a period on the 25th of july, i usually have irregular periods as i have PCSO, i started taking the combined pill aroud the 31st of july, i stopped taking it early and didnt take the full packet, around the 17th. now on the 23rd i had a small clot and thought my period had come, the morning after of the 24th i had stopped bleeding.. is this something serious, ive been in more pain than usual, or is it just part of my PCSO?