New here! 4 boys ans wanting to sway pink

I'm 28 with 2 DS (7 and 5) and 2 DsS (7 and 4). DH and I want to try for a girl! I plan on trying a LE diet with an excess of diet soda. I conceived my first boy on a summer beach bumming trip after two weeks of eating poorly and drinking heavily, and I conceived my second after losing 30lbs, eating excess protein and weight lifting.
Hopefully some drastic change will bring me to team pink!

Diet soda and drinks haven't worked and I've seen people drinking a truly insane amount of it only to get boys anyway.

Keep it to 2-3 servings a day as that is the amount approved by the FDA for use during pregnancy and thus is safe while TTC we assume