What Causes Low Body Temperature Along With Weight Loss?

I have low body temperature.. between 95.6 and 96.8; I am always cold; I have recently (within 12 months) lost 45 pounds which I attribute to a recent traumatic event (a breakup of a 5-year relationship) and I have lost some hair...no bald spots, but thinning. I am 71 an otherwise in great health...eat well, exercise with a personal trainer. Take very low dose blood pressure meds and chlorestoral (sorry for mis-spelling) meds along with 81 mg aspirin. My regular doctor found nothing with which to be alarmed.