Possible miscarriage ?

Shelby
I'm relatively new here so I don't know if this type of post is allowed on this board so please let me know if it isn't and I'll delete it ! 
Also, it's got some TMI, I'm sorry :( 
My husband and I started TTC our second child in July, we didn't really stick to it and just kind of stopped thinking/worrying about it, assuming if it was going to happen it would. Well about 2 weeks ago we did the baby dance and I was almost positive I had gotten pregnant. Well fast forward to yesterday and I started having some light cramping, which I told my husband in the car that I think could be due to possible pregnancy since that's what happened with our first, we got home and I went to the bathroom and there was some blood, but it was light and pinkish so I thought, awesome ! Maybe I really am pregnant and all this is from implantation bleeding ! The day went on and I went to the bathroom a couple hours later and there was BRIGHT RED blood, and lots of it, with large clots. The cramping has since gotten worse, it's radiating to my back too, and the bleeding remains really heavy and filled with clots. Since it was so early a pregnancy test wouldn't have shown positive yet, but my period isn't due for another 2 weeks so I'm really afraid we did get pregnant and I'm having a miscarriage. I don't really think there's any real way of knowing since a test won't show positive, but it's been on the forefront of my mind for the last 24 hours and I just want to know. Sorry for the super long post, I guess I'm just looking for someone who could say, "yeah it sounds like a MC" or "no you're being crazy and irrational"