Still no AF! Was due 5/4

AF was due 5/4 and I'm now 2 days late. My cycle is 28 days has been consistently for the last 4-6 months! Was originally a 30-32 day cycle after my thyroidectomy in March of 2014. Took a blue dye test yesterday and had a faint positive. Hoping it sticks and that AF stays away! This will be my 29th month ttc with my husband of almost 3 years. We have a 4 year old little boy who has been asking for a little sister! Anybody late or tested early and received good news? Fx and baby dust!