Hello, from your age and has been for so long without menstrual , you may be relatively small chance of pregnancy. But on the other hand the human body is a complex system, anything can happen, so do not rule out the possibility of pregnancy. I suggest you go to the hospital in time to do some checking, because women after menopause to reduce estrogen makes the body some changes.
Have you taken an HPT yet? I would say because your body is going through the change, then it might be possible for an egg to have slipped out. I'm not really sure. Try a pregnancy test and see from there. If you really truely think you might be pregnant, and if the test is negative wait a week re-do the test and then make an appointment with your doctor. Pregnancy symptoms and PMS symtpoms and menopause symtpoms can all mimic one another.