got her number and more. what now?

So i got my crushes (F23) number last night and also found out her birthday is next monday.

This all came about because she gave me a ride home from work and we really got to talking( even tho im only 10 min walk away)

We hadnt seen each other for like a week and she brushed her hand against my lower back, as she asked how my day was going and then later she offered to drive me home.

Anyways i was wondering what should i do now? Should i try to get her a small birthday gift or no?

What should i text her about, i got it from her because she mentioned she wanted to spend my birthday with me???

Im so anxious lol but im not over texting or anything