Correen, I've attempted to quit twice and this has happened both times. This time it's been due to 3 different bouts with bronchitis since I quit smoking. But even without the bronchitis... your lungs are cleaning themselves out, and the congestion can effect the amount of oxygen you're getting.
As others have said... if this becomes an ongoing concern or if it becomes severe, seek medical guidance.
[B]My Milage:[/B]
[B]My Quit Date: [/B]3/6/2007
[B]Smoke-Free Days:[/B] 115
[B]Cigarettes Not Smoked:[/B] 2,875
[B]Amount Saved:[/B] $1,063.75
[B]Life Gained:[/B]
[B]Days:[/B] 18 [B]Hrs:[/B] 12 [B]Mins:[/B] 47 [B]Seconds:[/B] 6