Hi Lynn, yeah, it is very normal for your bub to want to sleep in your arms! At 6 weeks a lot of things can change and a baby that normally sleeps well can become very unsettled. It can be caused by a few different things and it usually passes. If you are worried about reflux you could try keeping him upright for a little while after his feed (like in your lap or in his rocker) and you could try elevating his cot/bassinette mattress by putting rolled up towel underneath. This will help stop the acids from rising up while he is asleep.

Hope he settles down for you soon