HELP!! Baby isn't latching !

Ariana
Baby isn't latching to the breast anymore . My nipples have got bigger and his mouth is so tiny that just shoving the nipple in his mouth is painful. So I gave in and gave him a bottle of formula . I have been pumping to start give him breast milk from the Bottle but my question is, while I'm waiting to pump 3oz a bottle is it ok to give him formula so he doesn't go hungry ? I'm confused as to what to do and I don't want to give up just yet