For the past several months, my 42 year old husband has been experiencing headaches, dizziness, light headed, weakness, fatigue, unstable blood pressure going really high or really low with no in between, night sweats, and says he s freezing a lot in the evening hours. No fever. He s had exams/blood work for diabetes, etc. along with MRI and stress test, which all report back normal. He has passed out with these symptoms. It appears to get worse each week. There s definitely something going on with him but we re not getting results from family physician or ER physicians. I truly feel he may have a blockage decreasing blood flood to the brain. Yes, he has smoked since he was 15-16 years old. Please advise.