6 weeks baby doesnt sleep

[Trcnchi]

Hi all,
I really need an advise for our 6 weeks old baby.
Suddenly she became very fussy yesterday. She has lots of saliva and wants to chew her finger/hand. All night she was very uncomfy. She couldnt go into a deep sleep at all. She was hungry all the time.
Is this something normal? Do I need to cal Gp?
She was absolutely fine a day before and I am so worried and don’t know what happened in a day.

There's a big growth spurt around 6 weeks, so I'd imagine that would explain the increased hunger. Also at this age saliva glands start working, so that will explain the saliva.