ovulation/trigger shot

Heather • 💙Mason Robert 8lbs 11 ounces 20 inches 💙 7-29-18💙 💜 Autumn Rose 8lbs 2ounces 20 3/4 inches 4-16-21💜
I took ovidrel last night at 730am and I took my first test at 630am the middle test was 430pm and the last test was just 2 mins ago. am I def. ovulating or is this a false positive from the trigger shot? we are doing our first <a href="https://glowing.com/glow-fertility-program">iui</a> tmrw morning and I'm super nervous my follicle was 27mm on friday.