9 dpo and..

I have been cramping for the last 4 days, I have really bad gas and feel nauseous. I am tired and don't want to do anything! My period is still 9 days away and is always on time ... I have no reason to be cramping also I have had a lot of milky discharge thin and watery . I took a test yesterday but was bfn! Was it too early? Could o bf prego? Did anyone else experience this and get a BFP