Hi Ruby,
firstly congratulations! I too wrote this post when I was sleep deprived & I understand how hard the first few weeks can be. My son ended up having colic.
My son starting grunting early on, never during day time naps only night time. The digestive system slows right down at night time & this can cause gas. The grunting did stop at around 8/10 weeks. I found a few things helped me to sleep as my son was asleep and stayed asleep during most of the grunting in an active sleep stage. However his grunting woke me up all the time!
white noise, I found the lumi machine on Amazon the best as you can choose what “white noise you can” such as a fan noise which I find a lot softer.
swaddle swaddle swaddle. The tommee tippee swaddles which you can also find on Amazon are sleeping bags which you can put removeable arm covers on so it becomes a swaddle! You can use the newborn ones (0-3m) from 7.5 pounds.
dentinox drops, colif drops? These helped or seemed to help my son however it was trial and error with finding them as I first tried infacol that didn’t work.
my son slept most of the day and woke at nighttime as well until he learnt that nighttime is for sleeping. I used to give him a bath at 9pm which he would wake up for, he would stay awake in the bath for 20 minutes then would get ready for bed and have a bottle. This little night time routine cemented what would become his bedtime routine in the future. Because he had been awake from the bath, he would sleep straight after his bottle and I would go to sleep as well. It was also nice because it felt like my day was ending and not one long never ending time.
I remember feeding him on demand at that age too and it’s what they need. It’s really good he’s rooting and feeding. This time feels like It will never end but I promise you it does and it takes a few weeks for him to know what night time and day time is and start producing melatonin at night. Itll come don’t worry x