I had my tubes tied 14yrs ago and my period came on every month the same time but not it's coming on at different times of the month and i have night sweats before it comes on and during that time of the month can you help me understand.

Irregular periods.: Many things can cause irregular periods. If pregnancy is not the reason, thyroid problems can, among other causes. If you have begun any new supplements or over-the-counter meds, stop them. If you have night sweats for more than a week, get checked. Sometimes an infection (anywhere in your better) can have no other symptoms. Stress and illness also affect periods.