My lo is 3 1/2 months old now. He still spits up ALL the time. From the end of one meal, to the beginnig of another. At night though he does not spit up so much.... we co-sleep and he doesn't really move too much. I burp him and try not to churn his tummy by to much movement. He is a happy guy, gaining well and has good output. Is this much spitting up at this age still considered normal?