hiii mam, my son is 1.5 month old i want to know do he needs to feed bm very often till now nd how much time he should hv feed how would i get to know he is actually hungry bcs he cry even after having bm nd sometimes after 15 min or half an hour he wants it again i still can't figure out it can i use electric breast pump? is it safe to use for me as well as for baby? do it cause any kind of infections?