From breastfeeding to bottle feeding, colic and poor sleep.

My daughter is 7 weeks old. I had to make a fairly decisive switch from breastfeeding to bottle-feeding. I weaned off all breastfeeds over two weeks, going from all breastfeeds to three bottles (135 ml each) and the rest breast (three to four feeds). Then I switched completely to bottles. We looked at the box and our daughter's weight (+/- 5 kg) and came up with 5 feeds of 165 ml. Since she had to go from 7/8 feeds to 5 feeds so quickly, we decided to first give 7 feeds of 135 ml (which she often didn't finish) and then slowly transition to 5 of 165 ml. Unfortunately, this doesn't work in practice. Our daughter comes for a feed quite irregularly during the day (at least, that's what I think...). As a result, she sometimes has 5 feeds by 8 pm. Usually, the 165 ml bottles aren't empty by then. If we give her another bottle in the evening (because: inconsolable crying and hands in her mouth), she spits it back up in big gulps. Sometimes not until two hours later. An example from yesterday:

03:30 165ml
08:30 135ml
12:15 165ml
16:45 165ml
20:00 165ml
22:30 165ml (and this one came back up in big gulps)

Today:
04:45 115ml
08:15 140ml
11:00 135ml
14:10 150ml

During the day, she sleeps in between feeds for a maximum of 1.5 hours. Between the evening bottle at 22/23 and the morning bottle at 10/11, she sleeps well. She is awake for a maximum of an hour for feeding/peeing.

Today, she has cried a lot. She seems to have colic and spits up a lot of milk. In her sleep, she thrashes around a lot, and the only time she seems a bit cheerful is after she poops (which is with a lot of effort). I'm afraid we're giving her too much, but this is really what the packaging says.

She has always been a difficult sleeper during the day, and that's no big deal because she sleeps fairly well at night, but the crying today is really getting to me. And spitting up in the evening is not pleasant at all, of course! Any tips?