I think what the others have said is right - at 2w of age babies can't settle themselves. It takes quite a long time for any baby to learn how to self-settle - it's a fine art!

Rest assured that you most definitely are NOT alone - there are many other Mum's around the country (and indeed the world) who would be pacing the floors just like you are! I know it's hard work, believe me, I do. Definitely try the HAB or some other kind of pouch (whatever suits) to see if having her close to you helps her.

Whenever she does sleep, make sure you put yourself down for a sleep too - make sure you get all the rest you can get.

Be kind to yourself - it's hard when you're sleep deprived, but it does get better.