I've lost 10/12 lbs recently and it was unwanted. i get colder much easier now with dripping nose when it's damp and not very cold. is that why?

Hyperthyroidism: I would see your physician immediately and have a complete physical. Not only should he check to make sure with the weight loss and cold intolerance you don't have an overactive bladder, but you must have your prostate examined, a colonoscopy, and if you smoke a chest x-ray. For labs, a diabetes screening test, thyroid function, & prostate blood test. See your doctor!