I take it you are quitting smoking... As a former smoker myself (6 or 7 years smokefree) I can tell you it sucks at first but it does get easier with time TRUST ME!!!! Now cigarette smoke is offensive to me and I can't stand the smell of it anymore and lots of it will give me a headache...

You should start to notice smells are more pronounced... My nose is sensitive now to smells and all perfumes and colognes smell like buckets of dirty rear ends to me and I can walk by a candle or soap shop in a mall and almost get overcome by it...

You gotta change everything about your life if you want to succeed and I'm rooting you on... Good Luck and keep at it....