Did I had a miscarriage...?

Kaitlynn

...or just regular uterus lining coming out of me? I recently had my period two days ago. 20 mins ago I had the worst pain than the first day I had my period and this blob came out. I’m worried that I was pregnant (because my fiancé and I were worried, we aren’t ready for a baby) please tell me what you think and thank you! (It’s almost 2 in the morning when I post this)