change babies name at 37 weeks

Katlin
Ugh, am I the only momma who had a named picked from the time we found out the sex till now. Suddenly I wanna change it, no for any specific reasoning, other then I like Cooper better then Emmett now. Ugh is it too late? We have some stuff with Emmett on it, wipe case, onzie, and a basket...and we told our families that's his name. Ugh I need advice