HeartbrokenK is right. You need to listen to actions, not words.
Let's be real, two days isn't exactly a long stretch of sobriety. So far it sounds like she hasn't really even been able to respect your simple request for time to gather your thoughts. She says she's gone to "meetings"? Plural? How many? Is she actually going to daily meetings or just throwing words out there in the hopes that something will stick? My hunch is that your feeling she's telling people what you want to hear is spot on.
You ask how to tell if she's being manipulative. By that I assume you mean purposefully manipulative. Your really can't. And constantly trying to second guess someones motivations can be a terrible strain on a relationship. In the end it comes down to: Are you happy with yourself? Are you happy in your relationship with her? Are you happy with yourself in your relationship with her?
I know it's only been a few days, but it's got to be rough. Keep posting and reading here. It can be a lot of help. Wishing you support and strength.