Hello. I am a 43 year old male, I have smoked since I was 19. Lately I have seen streaks of light in my field of vision, seeing movement out of the corner of my eye without anything being there, and a slight headache. Today, every time I have coughed or sneezed, it has felt like I was losing my balance and was going to fall over. I have also had what feels like muscle spasms in my mid-abdomen, left side only. They are not painful, but it feels like a ball rolling on my skin when it happens.