Trigger shot question!! Please

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Im going to have my trigger shot tonight (Wednesday) at 8 pm and my <a href="https://glowing.com/glow-fertility-program">iui</a> is scheduled on friday morning. 
Isnt it tol early for the trigger shot?
What is the best timing to have it for a successful <a href="https://glowing.com/glow-fertility-program">iui</a> ?