Hallow Madam, You have undergone tube cutting and burning surgery 20 years ago. I infer from that by now you must be above 45 years of age. Madam, after 20 successful years of birth control after tubal occlusion, the chances of pregnancy are almost nil. You can exclude the possibility of pregnancy. At this age (45+ years), you are approaching menopause. In the perimenopausal age, the menses do become irregular and then gradually, they vanish. I feel delay in your menses could be due to approaching menopause. You should not have any stress about it. I do not think you need any treatment for it. The discomfort in the breasts also can be attributed to the perimenopausal changes. The pain in abdomen is likely to be due to water infection of your intestines, as your doctor has informed you. Oral rehydration will give you relief. Usually these infections are self limiting and get cured without any antibiotics. However, if it starts becoming worse, please report to your doctor who will review the decision about antibiotics. I hope this advice helps you.