When do you think it will be positive

Gwen • Had my sweet rainbow baby girl on April 3, 2017! 👶🏻🚼🍼 So incredibly blessed. ❤️
How many days until it should be a positive? I've been taking them for a week straight and not one has been positive. I think this is a little darker than they've been though. My body is all screwed up still from my miscarriage that I had back in November. My 33% chance was supposed to be 2 days ago but since they're all coming out negative It's been pushed back.