I'm at the part of the "Heartaches by the number" mission where you go to the silver rush and kill Gloria Van Graff. I went in guns blazing and killed everyone, but somehow Gloria ran off in the commotion and has disappeared. I've searched the entire silver rush store and looked around outside. I've tried saving then loading the game, I've tried fast traveling away and going on other quest then coming back, and none of it works GVG is gone and now I can't complete the [censored] quest. What should I do?

i dont know.. in fallout 3 there was a teleport to person "spell" you could use for this sort of things

try looking for that one.. should work here too