TTC #1 - when can I test?

Kayz
Hi all
Been with my husband of 3 months for 9 years now.  We officially started TTC #1 last Thursday (28 July).  
This was my highest chance day according to Glow.  It also says my period is due on 12/13 which is about right as I get a little earlier every month.
When would you say I can test, can the good tests pick up when i'm classed as late if i baby danced on 28 July up to 1 Aug.
Thanks in advance :) xx