okay so i need some advice. I've noticed that when my baby is sleeping and starts to fuss a tiny bit…

okay so i need some advice. I've noticed that when my baby is sleeping and starts to fuss a tiny bit here in there she doesn't wake up or cry. so would it okay not to get her and feed her? she is almost 3 months at almost 11lbs. I'd love if she'd start sleeping through the night or only waking up once would be great because I have to start working and idk how I can manage to get up all hrs of the night and then get up early to get us both ready and off to sitter and work. I definitely don't function on no sleep and I hate being woken up it's the worst always has been but of course I'll do what ever I have to for my baby. whats your baby's schedule what do you do to get them to stay asleep etc