part of it is developmental, I am going through the same, the new skill of pulling up is a big novelty & also separation anxiety is an issue at this time, so if she wakes up & is alone, she needs to know you come for her, so PLEASE don't let her cry alone, as you will only make it worse on yourself.
The other factor is you may need to "tweek" her routine so she is tireder at night... what is your day routine like & what do you do to wind her down for bedtime, just incase there is a "prop" issue.
i do think separation anxiety is part of the problem, so she really does need you there... I slept on the floor at times with my ds#1 & as yet have only needed to do that 2x with ds#2, both occasions he was sick, but I think that is a better option than bringing them into your bed