Hey mommas!

For moms whose feet grew after pregnancy, how long did you wait before accepting defeat and sizing up? My LO is 5 weeks old and all my shoes are still too small. As far as I can tell all my swelling is gone but I've been wearing the same birkenstocks that I wore basically my entire pregnancy as they are the only shoes that fit. I'd like to buy some new sneakers as a gift to myself to help motivate my workouts (once I actually start) but I'm not sure if it'll be a waste of money sizing up?

Help!