My Cat Recently Had Kittens but They Died

"I have also noticed she is passing some specks of blood. Is this something to worry about?"

Depending on how long ago she had the kittens and on the amount of blood being produced this may be normal and nothing to worry about.

But it may also be a sign of a problem such as a tear somewhere uin her reproductive tract, which may have been damaged during the birth. A more unusuals but possible reason is that she has a blood clotting disorder.

I don't kmow wht the kittenda died but it may be becuase the mother was weak and the bleeding may be related to an underlying medical condition. You should take your cat to the vet for a check.