Yes it most definitely is very very early days.
It sounds to me like you're doing brilliantly just as you are, as others have said.
I have two DC. Even though I'd done it before, I found the same stage you're entering now harder the second time round with my DC2. You expect because you've had one DC, that you "should" know it all second time around. But it's not the case at all, and your babies will be very different individuals, what worked once doesn't the next time etc. It's like doing it afresh all again in some ways.
Last christmas I was where you are now. It was a nightmare coping with 2 DC, a toddler and a newborn. Very very dark, difficult days/nights.
Compared to where we are now, this christmas gone, is totally different. DC older, things calmed down, almost normal! That intervening year has made all the difference. For me, it took until DC2 was about 12 weeks to pass out of the "windy-upset-do-I-give-her-a-dummy-do-I-start-a-routine horribleness" you so well describe! Things very slowly started to get better then.
One thing I do regret is not introducing a dummy soon enough. We did with DC1 and successfully weaned him off it by about 2.5yo by saying we'd lost it. But then we thought "we'll never fall into that trap again, THIS baby won't even start with a dummy! Hah we know it all now!". In fact, I wished I had introduced it in the first few months, because I always found they helped soothe babies and by the time I tried, she wasn't interested. The same with a bottle, I wished I'd introduced it to her in small amounts in her first few months. She's never taken to it and still BF'g at one year!! Funny, the things you swear you won't do again, suddenly you realise they were really quite helpful and smart strategies in hindsight!
So the lesson is, do whatever it is that gets you through the day and night, go with the flow, and don't worry about any of it. They all come out the other side eventually the same, walking, talking, sleeping etc!
Best of luck.