TMI Warning! I want your opinion: Was it a miscarriage or a chemical pregnancy?

A few months ago I had what I think is a miscarriage, pregnancy test was really really dark. Around 5 weeks along I started spotting after a couple of days it got darker and heavier I panicked and went to the ER (felt like an idiot afterwards because I wasn’t cramping bad or bleed whole) they did an ultrasound and found it in my uterus so it wasn’t ectopic which I paranoid about. Anyway they also drew blood and HCG was in the 6100s. A couple of days later I would’ve been 6weeks at that time went to the an OBGYN because I had started bleeding heavier and passing it tissue. He took more blood and HCG was 2500 so I did lose it. Sorry for TMI! Looking back the OB didn’t say actual miscarriage or what just that it gone but very sympathetically it wasn’t like he was an asshole about it lol. Anyway I was talking to a friend about it and she said I had a chemical, but I’ve heard if they can find it with and ultrasound then it is a miscarriage. So what do you think?

Sorry for the rant!