Verified answer

give it some time, definitely don't go crazy and overload her with text, phone calls or anything like that. You did say its was three days, that isn't very long. Give it a couple of days without trying to trying to contact here, see if she tries to contact you. after two or three days without hearing from here casually see what she's how she's doing, to let her know you are still interested.

she might have gotten scared on how quick things were going in just three days and needed some space or maybe jsut got really busy with work or school. the worse thing that can go on in relationships is that their is no space to live your own life. do not consume your entire life around a person. :)

If you didn't tell her that you liked her back then she might be embarassed, or she could just be busy.

give her time to think, because she wont want to be bombarded all the time. give her a little space and she'll talk :)

Confront her about it. if she Really likes you, she will tell you whats wrong.