Hello, Thanks for trusting us with your health concern. If a complete hormone profile including thyroid profile, serum Prolactin was done and reported normal, you are not in the perimenopause and this is not the cause for the absent period.A sonogram of the pelvis, preferably in the trans-vaginal route must be done to look for any local causes like cysts of the ovary. Antral follicular count is another way to see if there is any deficit in the follicles resulting in amenorrhea. Stress, sudden weight changes, certain infections and medications also can cause such a delay and have to be excluded. Please try to maintain a healthy diet, proper weight and regular exercise. Your symptoms suggest hormone imbalance. Withdrawal using progesterone can be tried if deemed possible to get some relief and to reset the cycles on track. Please do not worry, such things are common at this age. Hope this helps.