Period or Miscarriage

So bout week ago I got a faint positive on pregnancy test I was going to go to doctor to get tested to see if I was actually pregnant or not just in case I had a faulty pregnancy test my appointment was going to be this Friday but today I woke up with very bad cramps and gush of blood I’ve been soaking up a super tampon in hour or 2 exactly if I keep it in any longer then 2 hours (witch I’ve tried) I would leak all the way to my pants and the spot would be bout size of a palm it’s been going on all day same with pads there soaked up in a hour I was at work and had to be on toilet for an hour Bc I was basically dripping very bad in blood I passed a few clots and a clot that was a shape of a string I messed with it and it was just a string wasn’t very big idk what’s going on or if it’s just a very heavy period the cramps have been so bad I’ve been taking medicine all day long I’ve almost cried on how bad these are