As in blood like blob? Could be a clot? I had a few of those with Seth, and some of them were a bit scary in size but perfectly normal. If you are worried be sure to see your carer, but I'd say so long as you aren't having excessive blood loss or abdominal pain its probably the usual clotting that can come after birth, oh and take it easy too as I found if when I got too active too soon the clots got worse again.