Just won millions in the lottery? Congratulations! Here's what to do — and more importantly, not to do — to avoid making some very big mistakes.

The jackpot was last won on Dec. 7 when a New York lottery player won a $256 million Powerball jackpot. Meanwhile, the Mega Millions jackpot is at $1.15 billion for Tuesday's drawing - the fifth largest ever - with a cash option of $516.1 million, according to the Mega Millions website.

The winning numbers in Wednesday evening’s drawing of the "Powerball" game were: 15-26-27-30-35, Powerball: 3 (fifteen, twenty-six, twenty-seven, thirty, thirty-five, Powerball: three, Power Play: three)