Rock n play to crib

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I would like to transition my 10 week old from his rock n play to his crib.  However, he has reflux and it worries me he will be uncomfortable.  We have a crib wedge so hopefully that's enough of an angle. I want to transition him already bc he's 16lbs and 25 inches long.  He's just getting way too big for the rock n play.  Any advice?