No this is not menopause. Menopause is the absence of a period for a year or more. You are not likely having periods this close. More likely you are having break through bleeding. If you are on the pill or birth control, it may be a side effect of the birth control. If you are at risk of stds you should be tested.
You should do a pregnancy test to be sure you are not pregnant. The bleeding you had at 19 days could have been ovulation.