When to trigger for iui

Hayle • 5 yr old daughter. 1 👼🏼 1-23-19. Ttc baby #2.

So I only have one follicle this time 🙄 but we’re doing iui on Friday. I have to give myself the trigger shot and she said my time would be 2am Thursday or just when I wake up. My iui is scheduled for 1pm Friday. I rather do it early so I have a better chance. Any recommendations? Should I do 2 am or just do it at 7 when I wake up?