Early Withdrawal Symptoms - there is lots of good information on the site. Just search on the magnifying glass. Irritability is also very common. That's why it's good to continue to educate yourself to know what you're feeling is normal "usually". I had more emotional symptoms than physical. Don't forget, not only have you eliminate nicotine from your body, but also thousands of chemicals when a cigarette is burned. It stands to reason, your body is going to respond. I ate more too!