Based on the fact that you do smoke and have had weight problems, it would be easy for me to say to change your lifestyle etc. However, the silent killer is heart disease and heart issues and sometimes we are not always aware of other factors that could be contributing to these conditions. Do you snore? I was unaware of the fact that I was snoring until I married my husband. He made me aware that I was snoring and I realized that must be why I wasn't sleeping well and always waking up feeling unrested and with chest pains. I avoided using a CPAP like the plague, and then I found snoring mouthpiece and I was surprised how fast it worked. My health and life improved. I feel much better now. Possibly, this could be a solution for you.