How do you know that you have started menopause? at age of 45 periods just stopped. now 2 yrs later started again and very abnormal

Menopause ?: Age 45 is early for menopause, but at this time, your ovaries require a lot more stimulation to produce ovulation, which means your periods will stop until the level required for ovulation is reached. Meantime, your estrogen levels are much higher, and this makes the uterine lining thicker, which produces irregular bleeding due to the lining breakdown. Ask your gyn about low dose oral bcps.