MI had my tubes tied last year and had heavy periods after the fact, but within the past 4 months my period has returned to normal. I just had a normal period last week, but now I have cramping in my lower back that goes down to my upper thighs. I have sore breasts off and on, and a lot of clear vaginal discharge . I m a bit worried it may be pregnancy, or something to do with the tubal ligation .