I have PCOS and I never know when I am going to have my period and almost 3 weeks ago i had a normal period and then 3 days ago i started bleeding again but never like before...It is really heavy I feel really weak lately little cramps and today it got worse I put a tampon in and 2 hours later my pants were full of blood and I went to take the tampon out and a big clot of blood came straight out...Did I have a miscarriage?