I have been off cigarettes for 8 months. Lately I have gained 10 pounds and want to smoke. I moved my nic back up to 18mg from 12mg (started at 18mg). I was very happy with vaping before and have no idea why all of a sudden I am having problems. I did smoke for 37 years and have been under stress, but lately nothing seems to satisfy me. If I vape to much my heart starts to race, but still not satisfied. What is going on? Please help me. I recently lost 50 pounds (now at ideal weight plus 5lbs., thank God I built in a buffer) and don't want to gain it back or start smoking again.