(CNN) -- It was the perfect summer day for a wedding. The bride was glowing. The groom was handsome. For nine hours, Tiffany Burke photographed the memorable moments.
"I took one break for 15 minutes, to eat really quickly," Burke recalled. "You don't want to miss the shots; that's what you are paid for."
Later that night, she pulled into the driveway of her Bellingham, Washington, home. She walked inside, put down her gear and ran to the bathroom.
"I just started puking and puking and puking," she said. "I was just grateful that I hadn't puked at the wedding or on the bride."
Burke is six months pregnant. She's already had two children. But this time, she's carrying a baby for someone else.
Her past pregnancies were relatively easy. She did have morning sickness with both her sons: Holland, 7, and Blake, 3. This time, it's more severe.
She is sick most days, all day. Anti-nausea medicine helps, but only to a point. Sleep is the only thing that makes her feel better. There are many days the 31-year-old stays in bed until 2 p.m.
"I have my off days, where I am crying a lot. In fact, I may start crying again right now," she said. "But I would totally do it again."
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