Thank you so much for your advice!
Yes it sounds like a miscarriage and the more you get up and walk the more you will bleed. The brown spotting is old blood but you will find that new blood will show up if you walk alot. you need to see an ob and make sure your levels go back to zero. best wishes.
It sounds just like when I had my miscarriage. I found out because I was spotting. and a week later I had cramping and heavy bleeding. However, if you are still bleeding I would go get checked out you may not have passed everything if it was a mc or you could still be pregnant. If you did mc you want to make sure you don't have an infection from not passing everything, or having sex near the time you mc'd. Hope everything turns out ok!!