Congratulations Bald!

That's brilliant news! And welcome to the world mini-Hedgehog (or Hog-hodge as DD1 very cutely calls them!). Fingers crossed you turn out to be one of those magic babies that spontaneously STTN from 8 weeks and evermore, undisturbed by wind/illness/teeth/digestive issues/light and noise!!
Welcome to the thread Scandi. I'm currently getting to that point with DD2 who is about to turn 6 months (where the bloody hell did that go?!) and who is currently spending every night refusing to sleep anywhere but on my chest. Again having a bit of a sleep regression.
I agree with Hear that a certain amount of it is age and development related. DD1 was a bloody awful sleeper for most of her first 2 years, despite various attempts at gradual withdrawal sleep training. She was 15 months before it seemed to click, although we have had numerous regressions since then, the most recent from March until about 4 weeks ago, with tantrums every bedtime, multiple night wakings and taking up to an hour to resettle. Not fun with a baby as well!
She has now gone back to settling well by herself and mostly sleeping through. If she does wake, she will usually re-settle quite quickly.
I've come to the conclusion however, that she won't be a reliably good sleeper until all of her teeth are through…
One thing that did help with her sleeping was noise - not so much white noise which she was never bothered about but at 15 months I discovered if I left talking books running, she was much less likely to wake up and scream for me. Don't know why talking books, but she still likes them now or otherwise classical music.
It was also very helpful when DD2 arrived as it softened any noises or cries at night so DD1 learned to sleep through if DD2 cries.
We're off tomorrow for holiday mark II. Hoping they got all the illnesses out of their systems on the first attempt….