I've decided that pregnancy is like one long extended hangover. It starts out with vomiting and severe exhaustion in the first trimester, followed by lasting headaches and less severe tiredness in the second. I'm guessing the third trimester will be all about body aches and pains, which seems pretty closely aligned with the progression of a bad hangover but with none of the fun from the night before. Add in the constant struggle against dehydration, overwhelming need for comfort food (especially cheeseburgers), difficulty sleeping, and sour stomach and it's almost a textbook case.