The mom of two says she “just can’t believe I kept my eyes open the whole day,” reports What to Expect.

“This is the time for guerilla sleep,” says board-certified sleep medicine researcher W. Christopher Winter, M.D., of Charlottesville Neurology and Sleep Medicine and author of The Sleep Solution: Why Your Sleep Is Broken and How to Fix It. “You need to try to get it when you can.”

While sleep deprivation is a real problem for new parents, Dr. Winter says he has found that many new moms and dads are getting more than they realize.