Anyone suppose to start 8/8/15 and haven't ??

Susan
I was to start my period 8/8 and nothing ! Took several tests last week and week before and all negative ! Don't want to lee wasting money but I wish Aunt Flo would come or is get my bfp !! I had a miscarriage in March and even was reg after that ! First times in over a year I've been irregular !!