I think Higbee is ok, leaf. I went back to look at some of the game to see what may have happened.
Higbee was bent over on the sideline with about 4 minutes left in the 3rd. He must have taken a shot and the announcers said that, too.
Higbee lwas bent over like he was ready to hurl (if he actually lost his lunch, they didn't show it). But the Rams' first possession in the 4th quarter, Higbee was on the field. So whatever it was that put him on his knees in the 3rd quarter must have passed. He appeared to be ok the rest of the game.