Can anybody help me, please?

i asked out my coworker last week to see the hangover 2 and she said yes! last friday i got her number and planned the day that we can go out which is tomorrow. i told her i would call her later and we could get it planned out better. i called her yesterday morning around 11:30 she picked up and then hanged up. then i waited about 3min then i called her back and this time she didnt pick up. maybe she was a church or something and forgot to turn off her ringer but i left a message saying either call me back later or i would call back later. i called about 5:30 that evening and still no answer. i dont know what to do when i talked to her friday she hugged me when she saw me and she picked the day to see the movie. i know she works today so i dont think she will call but should i call tonight or tomorrow or not call at all? Thank you