[YorkieGuru]

I have been noticing that one of my dogs keeps her tail down quite a bit and keeps licking her *u know what*. So I took a look down there and noticed that she is bleeding. She was in heat about 3 weeks ago. I find this weird, cause her behavior is totally different from when she was in heat 3 weeks ago, than how she is acting now.
Her *u know what* is darker in color, and I'm not sure if this is normal or not.
Does anybody have any advice for me?
If I need to make a vet appt. I need to know by early tomm morning cause they are only open til noon.. but I dont go to the vert if this is normal.