Its very common to get AF cramps around the time your AF would have been due and all through the first trimester...it means your uterus is stretching and getting ready for bubs.....some people even get spotting which is why some people dont know they are pregnant for ages - they mistake AF for spotting

Basically, no AF is all good. Go to yr Dr and get a b/t and see if they will do another two/three days later. If your pregnancy hormone hcg is rising (roughly should doubt in that time) then that's also all good

Good luck