i was 9 days late for my period then i got it but it lasted 4 days the 1st day was like spotting the 2nd day was heavier and the 3rd light and the 4th light im 21 years old i am always 7 to 8 days and heavy my weight hasent changed or eating or sick and i havent been stressed i went to the er the 6th day i was late and done a urine test it was negative i dont no what to do or if i can be pregnant