I was 4 days late on my peroid and then I came on but it lasted 3 days it was not that heavy. I've been feeling and have been sick and dizzy and headache could I be pregnant?

If you got your period, that's a sure sign that you ARE NOT pregnant. Are you on the pill or any kind of medicine that might make your period irregular? If so, that could be the culprit for a shorter, lighter period.

I'm not on any medicine or pill. Think a trip 2 doctors

See the doctor or do a test it could have implantaion beeding