You really don't want to do that -- it's unhealthy. Slow and steady wins the race.
When my mom & I needed to lose water weight for a party dress, we fasted with lemon juice. It makes you pee alot.
For a regular diet. Cut out anything white. ( flour, rice sugar ect) select green
Vegetables. Cut out soda, inc diet soda.
Walk after every meal. Watch portion size. Better to eat 5 tiny meals than 3 big ones. This speeds metabolism.
If you take meds, reevaluate them. I gained 10 lbs on the pill.
Swim if you are able. Many gyms have pools. Your ins may cover this,ask your MD. Good luck. Maxy