[Nalansor]

Hi,
My little boy, 7 weeks old, has developed a consistent fussy time at around 6-7pm. It lasts for 20 minutes to hours, hours, hours on end. (Last night it was until 1am) What can I do to help him?

He's on Similac Sensitive. We burp him after every feeding. When he doesn't burp, we keep him upright so the gasses can just come on out, but even that doesn't seem to do the trick.

Help?