How old is this girl? How long have you had her?
When is the last time she laid an egg?
Any swelling, bloat in the abdomen below the vent between the legs?
It's good that you are syringing the Corid into her, I would too. Is it possible that she had an egg break inside her?
If you have vet care that is always best, the blood is concerning. Since you have liquid Corid, you can give her a direct dose (undiluted) at 0.10 ml per pound of weight for up to 3 days - this is in addition to getting as much of the mixed Corid water into her that you can too.
Still work on the crop, massage it gently and see if you can get things moving.