Waking up shivering and gagging

This happens every few months, sometimes it's even happened more than one in a week. I'll go to bed normally however I will sometimes wake up in the middle of the night, shivering but I'm not cold, its more like a twitch that I can't stop, its mostly affects my arms and legs. I also wake up with a temperature and feel really warm and usually have to remove my covers and put a t long thin shirt on, this help the temperature but its still there and so is the shivering. Usually what also happenes its that after a few minute I will start to gag, its never really that bad only happening once or twice, however tonight (the reason as to why I'm writing this) it was a lot worse. I woke up with the shivering and temperature, however I also felt dizzy and light headed every time I turned my head. I went to the tiolet and try to walk it off which sometimes works. But when I got to bed and thought that it was over the gagging started, it was so bad that I was actually sick. This has never happened before. I don't know what it is or what to do ?