Following a woman who is walking alone at midnight is not a good way to ask her out.
Yes, she flirted with you. Yes, she took your phone number. That's because she wanted you to go away, so she could safely walk to her apartment and go to bed. By the way, "I'm tired" and "I'm just trying to get home" both mean "Leave me alone."
So, no, she's not texting you.
Tired Person Walking in a Female Body