Hello..I m a 36 yr old mother of 3 with no complications,no health problems,non smoker,light alcohol intake.. I have always had roughly a 32 day menstrual cycle,however,in recent months it has varied from 30-70 days with increased lower abdominal pain & lower back ache not just in the pre menstrual period but throughout the cycle..my last smear screen 2 yrs ago was NAD.. I should note I did have a tubal ligation performed during my last delivery(a planned cesarean) 4 yrs ago. I am concerned about the abdominal bloating,most often at evening time but it is particularly bad following a work shift,as well as back ache that is now borderline constant! Any advice you could give me..EMMA