Hun, I seem to recall each of my DS's going through something similar at around 9 months too. I think it is an age where separation anxiety can be a big deal. How would you feel about lying down with her until she's asleep, or co-sleeping with her for a while until things settle down. It's a phase that will pass, but it will be much easier on her (and you ) if she has lots of reassurance in the meantime.

Take care hun