Anybody help please TMI Gross photo

Apologies for the gross photo😩 
So recently I lost my virginity to my boyfriend and we have had Sex more than once and a few times without a condom. I am on the pill and he also didn't cum, however, I am on my period and about half an hour ago I went to change my tampon and wiped and found this...
I've seen before photos like it saying 'you had a miscarriage' or it could be a blood clot, can anyone tell me what? Thankyou x