fussy baby

my son is almost 7 weeks old and the last 3 days. he been really fussy at night. he been getting a lot of hiccups. he does burp after and betwee eating 4oz of formula plus having regular bowl movements. plus he stays up most of the day and been really fighting sleep. I've even tried playing music along with his binky.

I'm almost at my end with him as I'm a single mom and just returned back to work. plus he won't sleep in his crib so he been sleeping in his rock n play for now as he more comfortable in that.