What's not a "Normal" period? If you had something but not what you usually have is different than having nothing at all. If the test was negative, test again and schedule an appointment with your OB/GYN for a blood test, and if the blood test is negative, you could have ovarian cysts or something like that that might throw off your period. Stress, diet, etc. can also throw you off so it could be a lot of things.
at 2:08 AM on Jul. 8, 2011