I'm 21,I always have regular periods my period was suppose to come on the 13 but came on the 20th.my period usually lasts 5 days i'm goin on 7.some symptoms I was having were: hurting ankles,sharp pain on left side below abdomen like on my vagina,mild soreness of breasts,fatigue,facial breakout,weight increasing or decreasing 7 to 8 pounds,and constipation.last nite I had a odd feeling on my left side of my stomach kinda like a tummy ache.