Personally, id say dont push it. 48 hours is really not healthy or sustainable. Its good to have structure when eating but not be on the border of starvation or an unhealthy relationship with food. You want a lifestyle change not a 1 month fix then bounce back. Even if you arent hungry, you should eat atleast OMAD. You risk vitamin/mineral deficiencies and will crash on your way to your weight goal. You need to check your calories for your OMAD if OMAD isnt working. The calories for that meal should be below your TDEE.