21y/o female shiver/chill spells several times/min when sleeping. Also talk loudly/shout sometimes and snore. Hard for people to sleep beside me.

Sleep disorder. Sounds like you have a sleep disorder . I would suggest that you speak to your physician first for a general checkup and a possibly a referral for an overnight sleep study to gather more data. It's easy, and nothing is uncomfortable. Give him/her a call today.
At least two issues. You should be tested for obstructive sleep apnea by a local pulmonologist. With regard to the chills, you should be undergoing testing to see if you have actually have fevers or if this is due to other issues. Please see a good internist or infectious diseases specialist.