Looking for advice/tips

Sorry this might be a long one! My 7 week old is EBF but I am finding the cluster feeding in the evenings and feeding on demand during the day really hard. I formula fed my first and I loved the routine knowing she would need a bottle every x amount of hours. I know every baby is different but is there a rough age where the cluster feeding stops and they start feeding in more of a routine during the day? We’ve also started to try to introduce 1 or 2 bottles a day, whether that be formula or breast milk. Ideally I wanted to do the bottle of formula before bed in hopes she might do a longer stretch of sleep at night but because she’s cluster feeding so much in the evenings she’s refusing the bottle as I’m guessing she’s not hungry enough, so the last 2 mornings we’ve given her a 4oz bottle which she will take but only has 2oz. I thought it was because she wasn’t keen on formula so 3 hours later I tried her with a bottle of breast milk and she only had 2oz of that as well. This just doesn’t seem enough for a 7 week old. I’m really stressing myself out as I have some things planned in the next month that I’ll need to leave her for and if she’s not keen on bottles it means I won’t be able to go 😢 I just don’t really know what to do or where I’m even going with this😂 kind of feel torn between carrying on BF and wanting to switch to bottles (if she eventually takes it). Any tips on how I can get her to enjoy a bottle and preferably before bed?