OK, sorry about misinterpreting your post about the weight loss. Well, nicotine withdrawal's a major shock when done abruptly by a heavy smoker (hence the popularity of doctors prescribing nicotine patches or nicotine gum [the latter's available OTC in many areas] to help take the edge off nicotine withdrawal symptoms).
However, my uncle went the nicotine gum route and while he stopped smoking, he was chewing the gum for over ten years (you're supposed to just use it as a transition to not consuming nicotine at all).
No im 32 years old i mean.
Losing 32 lbs in 13 days, along with coping with nicotine's absence, represents your body is under massive shock, an extremely unhealthy situation imo. Assorted and varied symptoms seem likely enough.