ive read that i should not mix breast milk with differnet temperature but am wondering if its ok to combine my let down reflex breast milk from a few feeding sessions? currently im 'cathing' my let down reflex breast milk with bottles during every feeding session. since the amount is not alot, i usually combine them over a period of 6hrs (about 3 feeding sessions). but now im rather worried about the difference in temperature(body temp and room temp). does it matters? or can i continue to do what im doing?