My daughter is 4 weeks and EBF. Recently she has been more sicky (sometimes just possetting and others a LOT of sick). It's currently 5am and I've been up with her since 1:30. She will feed and then I will burp her. However within 10 mins or so she is crying and wriggling around. I swear between feeds I can get her to burp 8+ times and it still doesn't seem to help. With the burps comes sick and I can hear and feel her tummy rumbling etc. I've tried keeping her upright after a feed but that doesn't seem to help either. Is this colic?