In the past:
Here's an improved and expanded version of your passage, with added details to enhance the flow and increase the word count:
Serena jolted awake, startled by the sudden noise and commotion around her. She blinked rapidly, her heart racing, and turned to see Jane hovering over her, shaking her gently. Serena rubbed her eyes groggily, trying to gather her bearings. "What's going on?" she asked, her voice thick with sleep.
It had been the first time in what felt like forever that she'd slept so peacefully. In her dreams, her father had appeared, just as he used to, his presence comforting and familiar. She could still feel the ghost of his hand softly stroking her hair, a gesture that had always made her feel safe. The memory lingered as she woke, leaving her with a faint smile on her lips. But the peaceful moment was quickly shattered by Jane's sense of urgency.