My roommate has been complaining about a stiff neck/shoulder for about a week. We've done massages and heating pads. She's even used some of her prescription medications to relieve it but it only gets better for maybe a few hours. Today to try to help we went to the hot tubs. After her neck quickly tensed back up, started seeing little flashes, got a headache and her right leg started twitching. Not long after she puked. Should we go to the ER? What could this be?