Is my Depo shot effective yet?

I recently got the depo shot last week Thursday (July 9th), which was the 7th day from the start of my period and I have a dick appointment tmr on Tuesday (July 14th). I searched up online and planned parenthood said if you get the shot within the first 7 days of your period the shot should start working immediately so I was wondering if it would be active for Tuesday? I actually finished my period on the 6th day from the start of my period but I’m aware there’s a period when the egg releases again and then the ovulation period starts. I just don’t want to take the chance and have him cum in me and then get pregnant. Pleaseeee respond