Should I opt out of the monthly payment for child tax credit? I have no income but I gamble and I am not sure I will have enough loses to offset my winnings.

I hit a decent jackpot and am concerned my loses will not offset my winnings and thus put us over the threshold for married filling jointly.  Neither my wife or I will have any income for the year, and I know my gambling loses can be claimed up to amount of winnings.  The unfortunate thing is they (casinos) don't generally supply win loss statements until after the end of the year.  Any advice would be greatly appreciated.