It sounds like a form of separation anxiety, which is common around this age.
You say if you put her down awake she won't settle. Have you tried putting her down when she is already asleep, in the last week? I wouldn't even bother trying to get her to self-settle just at the moment when it is so distressing for her - it's not good for any of you.
I have found with my DS that he sometimes has little phases of not sleeping so well, but they usually pass in a week or two.
My mum swears that with my sister and I, phases of bad sleep correlated with acquiring a new skill, e.g. crawling, walking.
She isn't teething, is she? That can throw everything into chaos temporarily.
My opinion is that you need to stop her getting so hysterical that she needs to come into your bed. Don't let her sleep in your bed alone at any rate. So basically you need her in her cot at least until the time you want to go to bed, and preferably much longer! In this household, if DS (11mo) won't settle then we go through rounds of breastfeeding and rocking/singing softly in the darkened bedroom until he drops off. We don't offer anything other than this. And remember, if she does go off to sleep in your arms and you are worried about her waking up once she goes in her cot, wait until she's in deep sleep, i.e. no twitching, just like a complete dead weight.
I'm sure someone will be along with more or different advice - I'm just sharing what works for us.