I've Been Smoking For 5 Years And, Sometimes I Just

I've been smoking for 5 years and, sometimes I just hate it and want to quit. Well for almost 2 weeks maybe I'll try and smoke but then I start gagging, I supress the urge to puke. I happened to take a pregnancy test and it was positive for the first time in YEARS. People in his side of the family said they had it too. Possible sign of pregnancy??