WTH is this?

Dana

This morning, AF would have been 4 days late and I’d be at 18DPO. Noticed some spotting so I put on a pad...20 minutes later I get this and some blood comes out while going to the bathroom...but nothing else. Can someone tell me what this brownish lump is?! I’ve never seen this before. I normally get the darker clots seen below. Help 😩😔😫