How long should my baby sleep?

Gem • Mum to my daughter and angel baby + rainbow baby due July '24 ♡♡♡
This rarely happens, but in the last couple nights my little girl has been sleeping from 6-8hrs. Right now she's been asleep for 9hrs.... is that bad? She's 13 weeks old. I am now up, at 8:30am. I check her every couple minutes cause it makes me paranoid.. Would she be starving right now?