If you have undergone IUI with ultrasound and trigger shot, when shot administered in relation to ultrasound?

Cynthia • I`m 33 my Husband is 37 we have 2 beautiful baby girls, and have 2 fur babies. First daughter conceived IUI. Second daughter is a miracle.
I have taken clomide CD 5-9 and am scheduled my ultrasound to check folecules on CD13. My Dr prescribed a trigger shot and I am to bring it. I am new to this and don't know when these things take place normally I get a positive OPK on CD 12-13 and then have next day as ovulation and confirmed temp shift the following. My Dr looked at past charts sp he know this, do you think he will administer tiger and we will need to return following day for the <a href="https://glowing.com/glow-fertility-program">IUI</a>? Also what if I get positive OPK before my appointment?

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