Any ideas on why i'm getting dizzy when i smoke cigarettes?

If this is new: and you haven't switched to a new brand, I would see your doctor. Inexperienced smokers commonly get dizzy with smoking, but at your age I am assuming you have smoked for 25+ years. If you are smoking much more than you used to, that may explain it, either because of higher nicotine and carbon monoxide levels, or because you are hyperventilating. Maybe this would be a good time to quit.