TMI post trying to decipher what this is

Hey everyone. I’ve struggled with Endo problems since 12, and have had one other time something similar to the picture below but it was more white ish and lumpy. I pass a lot of clots but haven’t had a big one like this in a long time. My partner and I don’t use protection and have sex typically around the time of predicted ovulation given test strips. My period was a day late and was a little different than normal. Does this look like a “chemical pregnancy” aka a very early miscarriage to you? Or just tissue with clot? I hurt very much during this passing and was in a lot of pain for a week and still having some pains and now mild spotting. Thank you for your time.