Background:

I know her from class. Got her number, called her to set up a date. 1st date went OK (first date after swallowing trp). Good talk, kino+negs. I didn't try to kiss her however (I know, my bad). After 5 days I called her to set up a second date. She didn't pick up. I like this girl, not calling me back however made me try to forget her asap.

A couple of hours ago, 4 days after I tried calling her, she sent me a text:

"Why did you call me last week? :)"

What should I do?

a) Call her back today or tomorrow, to set a new date.

b) Text her: "to set up a date." + date suggestion

c) Text her: "to set up a date." without date suggestion

d) Text her: "Why didn't you answer?"

Other suggestions? If I should text her, how long should I wait?