I’ve had my period since I was 12, I always had it once a month, I was on birth control for a while, I have been off of birth control over a year. I always have my period at the beginning of each month, I bled lightly for 3 days from the 31st-3rd (started the night of the 31st)l stopped bleeding about midday in the 3rd this month. My period is 4 days late, MIND I have NEVER had a late period. Does anyone have any ideas? I already took 2 tests, both were negative (they were pink dye) should I be worried or just wait to see what happens?