Aww, mama, I'd say best to check this with your OB or lactation consultant na, kasi hindi ko alam kung breastfeeding stage ka pa or what, pero ang sakit sa breast especially pag pinapindot ay hindi dapat i-ignore! One of my mum friends had something similar and turned out she had a blocked duct, kaya kailangan ng proper guidance, mas maayos na talagang makita ng doctor para sure at matugunan agad bago lumaki ang problema. Sending you comfort, sis!