Chick attached to shell - prolapsed vent??

[The_Chicken_Tender]

My third chick just hatched, but it seems like there is a cord attaching it to the shell. I removed her from the incubator and put her, still in half the egg shell, into a cup under the heat lamp. I didn't get a picture because I am worried to move her too much.
Also, she seemed to have some blood on her when she hatched. She is very active and cheeping a lot, so she seems healthy.
I have read some other posts where the yolk sack doesn't fully absorb by the time they hatched. I am wondering if it could be that or something else?
Thanks

Update:
I just checked on her. It was attached by a tiny bit of membrane, which we cut. Now it looks like her vent is protruding. Has anyone experienced this?

 

[nuthatched]

Is it her navel?

 

[The_Chicken_Tender]

Is it her navel?

I don't know, I didn't get a great look before I grabbed her because it looked like she was going to accidently rip it off while moving around.