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Shawna Donnelly, of Clarkston, Michigan, said she played the "Lucky for Life" game -- and didn't check her numbers before going to bed.
"I woke up in the middle of the night and had a feeling I should check my tickets," Donnelly told Michigan Lottery officials. "When I saw I matched five numbers, I must have refreshed my phone 100 times to make sure I really won!"
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She said the timing of the prize was perfect.
"The last year has been the most difficult of my life," Donnelly said. "I've been taking care of my mom full-time, and it's hard to make ends meet. Winning this prize couldn't have come at a better time."
She claimed the price Monday, choosing to get a lump-sum payment of $390,000 instead of $25,000/year for life.