Maybe my W is the one that texted you. Look the script is the same with your W and mine. "I don't want to send you mix signals" "I don't want to give you false hope" Blah blah blah You have read her play book she has not seen yours
You got overly excited tonight now she brought you back to earth.
Sounds to me she tested the waters a little bit and you might have spooked her, this is why they say if W ever wants to talk about M don't get overly excited. However you did not completely scare her off, she is still willing to talk later on in the week. I think this is a good thing because it gives you a chance to calm down a little and think before you act.
Move forward with caution and remember how you got here, through patience and consistency, NOW is the time to really practice what you have learned.
It is ok she feels this way she is scared and probably a little nervous about what to say or how to react she was not ready yet and she realized it when she received your text.
Breath and see this for what it is.........a step in the right direction.