I still remember when Z was 6 weeks old and stopped sleeping and started screaming
it was SO hard, and not just the crying but I didn't know what I was doing wrong, WHY was he crying, why wasn't he like my friends baby who slept, and fed, and pooped, cooed and slept.
Answer is, nothing is wrong that you can fix right now. All babies are so different and some (particularly touchy ones) will cry more, will struggle to sleep on their own and will be fussier than others. If there is some reflux starting then 6 weeks is when it commonly kicks off. There is a huge growth spurt too and they just 'wake up'
For now, as Anne says, do whatever works. Do what in your heart feels right and don't worry about routine. I would suggest if the crying is hard on you all that you try a pacifier. They can be really really good for touchy babies, babies that need to suck and reflux/colicky babies.
Definitely give the dairy free a go, make sure you cut all hidden dairy too. What meds is your LO on and have you tried colic calm, or other gripe waters at all?
Hugs, it's tough, but you will get through it, things do get easier x