Day 4 on Chantix

To give you some background - I'm 52 and have been smoking for 36 years. I smoked between 1 and 1 & quarter packs a day.
I've tried to seriously quit one other time.
This time, I'M GOING TO QUIT SMOKING!
I've had a prescription for Chantix since March, it's been tagged on my refrigerator since then. This past Sunday morning I woke up and said "I'm going to quit smoking", I had 10 cigarettes that day. On Monday I had 8 cigarettes and decided to take my prescription in to be filled and on Tuesday I picked up the Chantix and took my first dose, Tuesday I had 5 cigarettes. On Wednesday I had 6 cigarettes, Thursday 8.
TODAY is my first double dose day.

Side effects - no nausea (yet), but hard time sleeping last night (unusual for me).

I still want to smoke but not as often.
My sense of smell is getting better.