I am 51 years old and have not had a period in 2 years. In November out of no where I started bleeding with any warning. I went to my gyn and she could not find anything wrong. She did a biopsy but that came back ok. She does not know why I am bleeding when it looks like I am postmenopausal. The bleeding does not last long, it just appears and I get some cramping but I feel fatigued. I noticed that sometimes the blood is pink with mucus and blood clogs. Is this part part of memopause and how long will this last ?