i am 46 going on to 47 in september. i am a matured student persuing a degree program at a university. i am currently doing summer school - 3hrs @ a sitting. lately, i realised my feet feels warm most of the time, i struggle to sleep and when i do, i don't sleep much. i have headache from time to time. lately i am getting all these pimples, leaving dark spots on my face. please, what's going on with me?