TELL ME MORE

So ladies.....I had my period Sept 6th till the 9th normal Cycle for me....but today I've been SOOOOOOOOOOOOO OO DIZZY!!!!! I feel so light headed it's ridiculous.....my period was a lot lighter than usual....1day of full medium flow bleeding...2ndlike nothing was really thwre just when I wiped and cont till the 3rd day...light brown blood to nothing here and there when I wipe... what can this be?!? Usually when I get my period it's 2full days of medium- hb.and the other 2day is finishing stages.