Miscarriage..?

First of all, I am making an appointment first thing tomorrow morning ASAP. But I REALLY am antsy and need some second opinions. So please chime in!

I was supposed to start my period around two weeks ago... I started 8 days late, or so I thought. It started off super light but with normal feeling cramps, sore boobs, etc. Tried to use a tampon for two days. First couple had just a little blood in the tip of it but nothing like normal. Then they started coming out with no blood so I stopped putting them in... still had some super minor light pink spotting. Got two pregnancy tests today and they both came back positive. Then shortly afterwards I had some bright red blood with some chunky clots in there, as well. Happened kind of intensely for about 15 minutes and then it stopped. Haven’t had any issues since... other than normal cramping, sore boobs, my lower back IS kind of sore, actually. Last time I went to the bathroom there was some rust/brown colored blood on the tp.

Honestly, does this sound like a miscarriage?