how long to wait

Sarah

Glow said I should start my period on the 27th, I told Glow I was late, so it told me I should start the 29th. well it hasn't yet! how long should I wait before taking a pregnancy test? i am 34, have an 11yr old, had 3 miscarriages in a yr & a half & then had my daughter who is just 10 months old!