Soooo confused!

Hey ladies! Quick question... my period came on Nov. 2 and left Nov. 6. A few days ago I started having occasional nausea in the afternoons. Last night my husband was cooking steaks, and I got nauseous from the smell. This morning, I got nauseous from my dogs' food when I fed them. I tried eating breakfast and it made it worse and ended up throwing up. I took a pregnancy test and it looks like it wants to show a plus sign, but it is so faint I'm scared I'm making it up in my head. Is there any chance at all that I could really be pregnant if the last day of my period was 5-6 days ago? Could I have been pregnant while on my period?