It is not that uncommon to have the bleeding. Unfortunately, I had to go thru a Doctor go up into my uterus without sedation to "check" things out. Actually a D & C in part. The internet wasn't around then but I discovered it was probably from the shot from looking it up in the PDR. I have had a couple since but I am post menapausal now. My Dr. will not give them but I will say they sure worked for my allergies and nasal problems. I don't know why Doctors don't know about this being a side effect. It isn't uncommon.