Af due August 11th

Latice • Gave birth to my rainbow 🌈 after 5 miscarriages. Blessed everyday I wake up and get to look into my little girls eyes.
Af due August 11th and we have a family reunion on the 6th which would be 9dpo. Would I get a positive result if I test then? There will be drinking at the reunion and I want to make sure I'm not before I get there. Should I test then or just be on the safe side and not drink at all?