My First IUI

I had my first IUI on Sept 15 at CD 12...I took clomid CD 5-9 and ultrasound and trigger on CD 10...on CD 10 I felt like was about to ovulate I tested and seen a surge so I called my Dr's office they told me to come in for an ultrasound to check me...sure enough I was ready....i had 3 follicles 20cm, 18cm, 13cm....they estimated me to ovulate on CD 14 and trigger shot on CD 12...I'm soooo glad I continued to test with opk test because if not I would have miss it.......