Such a weird day!

So I have been having weird cramping and pains for a couple weeks and I was hoping it was implantation and such. This morning I thought AF came so I've been bumped thinking I'm out for the month.. And maybe she has. I have had insanely horrible cramping worse than it has been the past two weeks and I started bleeding.This morning it started, and sorry for the tmi, but I was so heavy I soaked through a super tampon within two hours.. Then after that still getting insane cramping but almost no bleeding! Like very very little brownish. It's really weird. I put a call into my doc and I have an ultrasound scheduled for tomorrow at 12:30. So many weird things going on its nice to have you ladies to talk to.