carbon monoxide Hii ladies. This is a very strange question...I had blood work done 7/24 and tested…

carbon monoxide

Hii ladies. This is a very strange question...I had blood work done 7/24 and tested at a level of 4 for carbon monoxide. I had it re checked one week later on 7/30 @ a 4. A level of 4 is foe an average smoker. I have never smoked . I had the fire dept check my home and car both zero. The nice fireman texts me