yes this is unusual and bears investigation. it may be something as simple as a polyp growing out of the cervix (they are reasonably common) -- but i would call your health care provider -- she will probably want to check you and then may do a pap smear or a sampling (biopsy) of the lining of the uterus or an ultrasound to check the lining of the uterus -- all are reasonable to start with. the vast majority of the time the cause will be totally benign -- but it does bear investigation.
i'm 61 and went through menopause. i've not had a period in 13 years and yesterday i started bleeding. what is this?