Aww, ang frustrating nito talaga, lalo na first time! Sa aming circle ng mums, marami ring dumaan dito sa 5 months, honestly, sometimes kahit proper burping pa, may spit-up pa rin talaga, especially kapag mabilis kumain or shifting pa lang sa formula. Since you've already seen your pedia at normal lang daw (which is good!), try feeding her in a more upright position, maybe burp every ounce or two instead of just at the end, at let her stay upright for 20-30 mins after feeding, life saver din ito sa amin. If it's getting worse or baby seems uncomfortable/losing weight, definitely go back to your pedia, pero most likely ito lang part ng phase na dadaan sya. Hang in there, mom, it gets better!