Usually if you were a "regular" smoker (not heavy - not light) it would last you half a day (we're talking reg. size, 510 0.7ml - 1ml carto right?) maybe a little less. Based on my experience you are using about 2 to 2.5 ml a day wich is most of the time normal for most people.
Sorry if I wasn't clear enough, please provide more details so we can help further
And congrats on your 5 days! keep it up!