Missed peroid, I 'm 43, have had normal paps, but my cycles have been off last 3 years, is this normal

Not normal. Menstrual irregularities like you are describing may be normal, but they may also not be normal. I full medical history, including the age of menopause of your immediate female relatives, an exam and a few simple lab tests should prove your doctor with the information he or she needs to determine if this is normal or abnormal. Take a chart of your bleeding to the appointment.
2 possibilities. One possibility is irregular periods, which become more common as one progresses through time or ventures into menopause. Another is pregnancy. A physician should be seen and precautions taken till the visit.
Multiple reasons. Irregular bleeding is either due to hormonal changes, structural changes, or pregnancy. At 43 you may be having irregular ovulation, though one cannot tell without a more thorough evaluation. Your ob/gyn can be more helpful.
Not normal. Menstrual irregularities like you are describing may be normal, but they may also not be normal. I full medical history, including the age of menopause of your immediate female relatives, an exam and a few simple lab tests should prove your doctor with the information he or she needs to determine if this is normal or abnormal. Take a chart of your bleeding to the appointment.
Maybe. At 43 you can still get pregnant so this must be ruled out. Many women, as they approach menopause may begin to miss periods and this normal. If there is unusual bleeding like bleeding between your periods or bleeding after sex then you need to see you gyn for evaluation.
See your gyn. If is not uncommon to miss periods. There are multiple reasons such as thyroid, pituitary or ovarian dysfunction. Some women in their late 30's-40's may experience menopause early. Stress, eating disorders, strenuous exercise may also contribute to missed menses. See you doctor, simple blood tests and physical exams will usually explain your symptoms.