I'd start by changing your Centrum to Centrum Silver.

Centrum has iron in it... the Silver form does not. Iron for males is not recommended in supplement form unless your doctor tells you to use it.

Did you have CBC run? was your iron high? Was your ferritin high? If so, you could have a genetic disorder that may be overlooked by doctors, called hemochromatosis...this leads to PN symptoms. It is serious. It is often only found when extreme damage starts in the liver and other organs. Some people develop bronzing of the skin(looks like a tan), but that may come later in the disorder.

Change that Centrum or take a men's formula vitamin instead.
It may be worth your while to use a good magnesium supplement like SlowMag... or a chelate of your choice. Just avoid OXIDE form. Choose foods high in magnesium to support your exercise routines. I'd cut back for a while and see if you observe any changes in symptoms.
Information on diet and SlowMag here:
http://www.slowmag.com/
one tablet twice a day is enough for most people.

Some people develop tingling and other PN type symptoms when their blood sugars get LOW.... this is a starvation thing...as the nerves react when they don't get enough nutrients and glucose. Nicotine is a vasoconstrictor and as such also impacts circulation which shows up first in feet and hands.
Get shoes with a wide toe box, and don't lace them too tightly to reduce compression there.

Sometimes just making some lifestyle changes, will help. Start slow and sometimes that is all you need.