I am an on and off smoker who experiences times where my physical urge/craving to smoke is severely curbed. I had started again one month and got cravings as usual. I quit for three months soon after and started, and my cravings do not hit as hard at all. I have been diagnosed with auto-immune thyroid disease (at the time was not active). Can spouts of hypothyroidism curb my cravings for nicotine?