The Pill will not stop you from going through the menopause, but it will certainly stop all the potential symptoms. I was on HRT successfully for 10 years and finished last August. My hot flushes happen mostly at night and seem to act like adrenalin rushes. Herbal medicine doesn't work. The symptoms may be self-limiting and last only a year or so, but they may persist indefinitely and there is no way of predicting what will happen to your symptoms.
Every individual has to balance the risks against the benefits.
The answer is yes. The earliest I ve seen is in a teenager who had her menopause at the age of 14. This is extremely unusual and the average age for menopause is 51. The menopause is the result of the ovaries running out of eggs and there is nothing that can be done to halt that process. There s no male equivalent to the female menopause.