Ay, momshie, back pain na may chest discomfort is something you really need to check with a doctor ASAP, hindi dapat i-ignore yan, lalo na kung tumatagal na. Please go see your OB or go to the nearest clinic/emergency room para ma-check properly, okay?
A few of us moms have experienced different back pains depende sa posture or muscle strain, but pag may kasama na dibdib discomfort, that's beyond what we can advise on talaga, kailangan ng professional. Take care of yourself, ate!