About a week ago I started smoking (please don't lecture me, I just want answers). The day after my first cigarette I sort of had a headache, and within three days I'm sick now. This may be because I caught a bug from someone else, but I was wondering if there are any side effects after your first smoke?

Just a note, here's the symptoms I have (if it helps): sore throat, runny nose, occasional stomache-ache, headache, etc.