Hello doctor good morning,I m mega from kolkata. My problem is since 15 days I m feeling burning sensation on my lower abdomen,sides pain,lower back pain,tenderness in breast & also my period is late,I had last period on 11 July .i m a married woman & have no child yet.now me & my husband is trying for child,I tasted my urine through preganews but result was negative.i m 28 years old.now if I m not pregnant then what is the cause of late periods,tenderness breast,lower back n sides pain & sensation of burning in lower abdomen? Kindly answer this questions please...thank U very much...