My girlfriend hasn't contacted me in 5 days, should i worry?

So Me and my girlfriend haven't talked to each other since Monday, its saturday. I went over there monday with one of her friends uninvited and i feel kinda disrespectful for it? that might be a lil weird but anyways, She doesn't have a cell currently her mom has it turned off, but when she needs to get a hold of me she uses her mom's phone so I know she can call. But She hasn't called me. Me and her are in mad love though so am I being over dramatic? Is she still interested? should I Worry she found someone else? Please help I'm ready to die. But I got a hold of her sister and her sister said she wasn't home So maybe she's in St.Augustine with her dad? her parents are divorced.