I doubt you are still pregnant. Only light bleeding/cramps are signs of pregnancy
If you already were pregnant, you could be having a miscarriage. Better call the Doctor!! If you weren't pregnant it could be just a heavy period, after I was about 16 my periods got worse like that! It was amazing how much blood I would lose, if it doesn't let you in a day or so, call your GYN and ask the, . Don't take a chance. I always got bad cramps! Midol helped!! You can get it from a drugstore.(But don't take it if you were pregnant, without advice from a Doctor.
If you are bleeding, you should see the doctor NOW! It is a sign of miscarriage. And, to the anonymous who said "light bleeding is a sign of pregnancy", it is NOT a sign of pregnancy. NO bleeding is a sign of pregnancy. You DO NOT bleed while pregnant, or while GETTING pregnant. Whoever misinformed you needs to be corrected.