The aromatic part of aromatics won't cause blood sugars to rise. Just doesn't work like that. Nicotine itself with blood glucose levels- don't know.
Nicotine does cause vasoconstriction and blood pressure elevation- diabetics are already at significantly higher risks for cardiovascular disease, stroke, etc. You may wish to consider this if you're diabetic.
More importantly, be sure your A1C is being monitored by your doc - this reflects your control long term. If you have weight to lose do it, it's a huge deal.
Source: 4 years nursing school, 7 years acute nursing experience, 1 year managing primary care clinics.