Someone please help me.. I am 19 years old and my period has always lasted 4 to 5 days since I first got my period when I was in 5th grade. Now, the last time I got my period it lasted 2 days. This time that I got my period, it only lasted 1 day. I'm very worried about this because how can I jump from about 5 days to 1 day in only 2 months? I'm really young and worried about what is going on with my body and what I should do to take care of it.