I had my period about 2 weeks ago. I had endometrial ablation in 2011 so my periods are much lighter. I just got what I assume was another period, but it is VERY dark brown with a slight odor. I am 46 and believe I am perimenopausal. I was involved with a man who shared needles during IV drug use and was physically assaulted by him in January-NO sexual assault. The last time we had sex was in early January. I should also mention that he had a vasectomy 22 yrs ago and I had a tubal ligation 20 years ago. Should I be concerned?