Relief flooded Severus's mind when he heard the deceivingly distant voice of Lily calling for him. He rushed, or more half scooted, half crawled, to her side, momentarily grateful, for the fact she was still alive, but his elation dissolved when he saw the injuries she had sustained. The scrapes on her elbows could be healed easily enough, but a gash to the head could be just the surface of something more severe.
Thoughts raced through his brain, most of the centered around the idea that this was somehow all his fault. Maybe if he hadn't walked back with Lily, or had just apparated to the warehouse instead of walking back from work so that Lily would never have found him, or a thousand other possibilities - but all because of him.
Lily was hurt because of him.
"God, Lily," he could barely hear himself talk and was unsure if Lily even heard him. "Where are you hurt?" He didn't want to risk having her move just to cause more harm, but then he wanted more than anything to get away from the burning remains of that car.