sleep regression?

Samantha

my 5 week old is starting to not sleep. today is the first day hes done this. he woke up at 3:30am and went to sleep around 6:30am then woke up at 7:20am and hasnt went to sleep since and its now 9:50am.

hes making gestures as if hes hungry so i feed him and he only takes half an ounce then he spits it all up.

is this normal? is he just having a sleep regression? im worried as a ftm.