Should I be concerned?

Da

My baby is 6 weeks old, normally she wakes up every 3 hours like clock work so I’ve stopped putting on alarms because I thought they were unnecessary, and it’s nice sometimes when she goes 4 hours without feeding, but tonight, or last night? She went to sleep at 10:30, and now it’s 4:20 am and she’s still not waking up, and I don’t know if I should keep letting her sleep or wake her up, my family says let her sleep because that’s what they did with their babies, sometimes they even give them camomile so they can knock out for the night, but that’s like their own Ukrainian style I guess? And I don’t think Its good for the baby....To be fair she was having a hard time falling asleep since I fed her at 4:30 pm, and we fed her again at 7:30 and went for a drive and she kept going in and out of sleep so not very good, then at home she got colicky and finally felt better when we gave her a bath, and when we fed her at 10:30 pm she didn’t finish her bottle and usually she does (I give her a little more and it makes her sleep a bit longer) I don’t know why it works, I breastfeed her daytime, and bottle feed her nighttime, hubby’s saying she’s just catching up on sleep, but when he’s not home for a few days, and she doesn’t sleep well in the day time, she still wakes up every 3 three hours for a feeding, I’m a first time mom and I have no clue what I’m doing so if I sound silly I’m sorry 🙈🙈🙈