Have you been giving her daily soaks and keeping the protrusion coated with oil, ointment, cream, etc. so it doesn't dry out?
The bleeding is not good, it's fresh blood and if it continues, she so tiny she will become very weak.
The crust looks like a buildup of material/debris and poop but without being able to actually see it in person and inspect is closely, that's just a guess on my part.
I'd coat that whole crusty area with oil. Maybe some mineral oil to see if that helps loosen it up. I suspect that the inner tissue is trying to retract and it's tearing.
Seeking vet care is the definitely recommended since this has been going on for a while. Sometimes it's not possible, so do the best you can, but get her soaking if she's not lethargic and keep that tissue and protrusion moist with ointment.