Getting worried😕

Stormi💕 • Hubby and I are trying for #3 hoping for a girl!!💗
My husband and I had our third baby Paxton this past Saturday.... And ever since our four-year-old Riley has been in sort of a funk he won't really talk to us and has been really whiny and maybe even a bit angry..... I am not one who believes in middle child syndrome because we have always tried to be fair regardless of age but the fact that he won't hold or really even egg knowledge his little brother is starting to worry me.... We never had this problem with our oldest he was super excited to be a big brother both times.. I was just wondering how long it  will take for him to like his little brother and if he ever well.😢😢