IGF-1 testing and Clomid (clomiphene citriate) half life?

I need to get a second IGF-1 blood test done, and it is unclear whether I need to be fasting or not (1st doc indicated yes, second indicated no).

Separately, anyone know how long it takes to get Clomid flushed out of your system after a 7 day 25 mg/day stimulation test? Need yet another round of LH/FSH/T without any stimulation of the Clomid sort.

Many thanks - kazman