Negative test but 4 days late..

Leslie
My husband and I are NOT trying to get pregnant as we have a 5 year old and an 8 month old. That being said, AF was supposed to be here Friday, Saturday morning I had the slightest bit of pink when I wiped and that was all. I thought I was starting but have yet to have anything else. Took a test last night and it was negative. Last month AF showed up a week early and lasted like 11/12 days. <-- that doesn't normally happen. Not quite sure whats going on!!