I am chiming in with going and letting her know you were hurt by her non-response on Sunday. Maybe she was super busy? Or had a sick friend or family member, or saw the text while she was doing something else and then forgot to reply later? I am guilty of that last one!

There are a ton of reasons why she didn't answer, and you will only spin out until you talk to her about it-and waiting another week will probably only heighten your anxiety.