How soon did you test after hcg trigger?

Hazie
I know that it's very possible for false positives. So I'm not going to test early. But, were doing the hcg trigger with iui this month. Is 12 days too soon to test, or should I wait till 14?
​I might just start at 12 and see if the line gets darker. Just curious if anyone else was in a similar situation. Thanks!