8week old not sleeping

Is it normal for my 8w old to not sleep a lot she slps in burst of 10/20 mins at a time with a wake window of 3/4 hours

I thought babies that young sleep for 18/20 hours

Also wondering if she may be teething as she cries alot is drooling and gets quite only if she bites my finger

Can she be teething so early

Curious