well this month my menstrual was suppose to come on the 21st of Oct. but instead it came on the 19th of this month and when it came on it look a little different it came on normal and i few hours later it was a real light pink color then it went back to noraml and it did this for about 4 days on and off and stop i never was pregnant so i did know if thats normal or what i have been sexually active before this happen not durong or after i never a miscarriage or abortion or i have been stressed or anything so what can it be