The back and forth text messages in the last 2-3 days without her informing you what's up or lying about it, is all the info you've got to go on right now. What are you going to do now, for yourself?
Every moment you spend wondering what's going on with her, prevents you from choosing and walking your own path.
I'm sure I'd be wondering too, if my spouse was MIA, never mind an addict. At some point though, we all face acceptance or denial that another's path doesn't involve us. I've learned to go by actions, not words, and then my path reflects that.
You may not be there yet or are struggling with it. That's OK, if it's where you're at. The question is, where do you want to go, where do you want to be with YOUR life, not yours and hers together.