I'm very cold but i'm sweating, and when i put clothes on or cover up i start sweating even more and feel really hot (internally). what's going on?

Heat intolerance: I strongly suggest a full medical evaluation and thyroid analysis. If you are menopausal, consult your GYN. Have all hormanl levels checked.

See a doctor: i did not see your age on your profile that is going to make it harder to suggest something for you either way need to see your doctor to evaluate the reason for your symptoms could be a viral infection,hormone not balanced,anxiety the list is long go and see your doctor they can help you good luck

Fever and chills: It sounds like you have a fever and chills which may be due to an infection, viral or bacterial. If you have a thermometer at home, please check your temperature. If your symptoms worsen after tylenol (acetaminophen) or ibuprofen (Advil or Motrin) or aspirin, then you will need to be seen in an urgent care clinic or possibly the ER after trying to call your doctor's answering service.