Interrupting breastfeeding for an acid reflux baby

Lisa
Do any of you with babies with acid reflux interrupt their sessions at the boob? I was told to let him go 10 min, burp, then 10 more but when I let him go 20 min he vomited all over me. Now I've been doing 10 then 5 but sometimes he still acts hungry after. I know his tummy is only so big but idk how to tell how much he's getting! Any advice would be appreciated.