Methamphetamine is not contagious. You cannot get it from someone else and his having it in his system will not get it into yours even if you shared bodily fluids. Stress and emotion cause headaches. Nose bleeds can be from meth in a wide variety of ways. The effects of meth are not very long and even if it were a severe problem such as sky high blood pressure, the blood pressure goes down by the next day. There can be underlying problems like abnormality in the nose, even in the brain that can predispose to bleeding and there are serious and made worse by methamphetamine. They are not as common as just nosebleeds. Mostly, someone is going to stay on the methamphetamine. Getting into rehab would be a good idea in the short run.