2 day periods

I got period only 2 dayz of each month.Actually I got period 2 and a half dayz of each month. while i am menstruating its sometime deep red and sometimes light red but not brown. i always got this pain before my period starts. then it pains when i am having the period. my breasts also pain before and during the period. the pain starts 1 day before my period.Most of myy friends have period minimum 3 or 5 dayz.I dont know about my period is normal or not? is is irregular? i am 19 years old. can i have baby in future? plzz help me with this. i am really tense.