Andrea could not pinpoint exactly what woke her up. If it was the hard cold floor made of cement, or the frigid cold she was feeling, or the anxiety of what was to come after that loud bang at the bar, it could also be the uncertainty of not knowing where Bree was or how she was doing.
It could be any of that, but it was more of curiosity. The image of Bree collapsing and herself being taken away by shadows played over and over again in her head despite her unconsciousness. It was like a never ending cycle of pain and sorrows. Though she was asleep, her heart still hurt and her anxiety skyrocketed but her body was too weak to wake up.