i will be going back to work in Aug. and my LO will be 4.5 months old. heres my concern...LO will drink from a bottlle but prefers the breast. after 3-4 oz oof ebm she thinks shes still hungry bc she eats from a bottle faster...if i do feed her more, shes then been overfed & spits up a lot. im using first years breast flow bottles. i stop her often during a bottle feedig to burp her & to try and slow her down...she gets so mad at this! shell scream and thrash around til the bottles back in her mouth. we both prefer bfing but i do a bottle here and there to get her used to them. any suggestions/advice. its bad enough having to go back to work but to worry about feedings while im away makes me sick.