Awww, I thought you were all going to come back and say DON'T LET HER ON THE BED - LIFELONG ISSUES WILL BE HAD BY HER AND ALL THE FAMILY. I miles prefer the response I got! Thank you all 
She's a 9 wk old Jackadoodle (Jack Russell crossed with toy poodle). And to be honest I grew up with dogs but larger breeds like border collie and Labrador and they weren't allowed on the furniture, or upstairs. This was my rule with the 2 yr old for about a year and he didn't put a foot wrong. And then we realised that actually, he s a lapdog really and he likes cuddles and just to be near us and gradually we relaxed the rules until now he's allowed everywhere, inc children's beds
This goes against the grain, let me tell you, but it works for him and us. He either sleeps with DD1 (12) which I think is a lovely experience for a child to have, or he sleeps in his basket downstairs - he does whichever he wants/we want. Good as gold. Happy dog 
So, long story short - I'm not bothered about her sleeping rigidly alone/in crate/downstairs. If she wants to sleep on my bed (am separated from DH) then so be it. But I'm so pleased you all thought the same! And very interesting what the dog trainer said about not leaving them to cry. It makes sense doesn't it? She's just left her mother, father and 5 siblings so she's bound to need human company for a while. And yes, she went to bed in her crate with a hot water bottle wrapped in a tea towel (it had its cover on too!) and a ticking clock wrapped in a tea towel but to no avail. Hey ho, we gave it a shot and I'd rather have a sleeping, quiet, contented puppy in my bed (she's not actually in but may as we'll be!) than a distressed, crying puppy shut in her crate.
That said, I have 2 DDs and the puppy has now kept me awake for far more of one night than they ever did!! 