Ovulating before IUI

After taking 100mg Clomid for 5 days this cycle, I went for my FRM ultrasound this morning (cycle day 13) and they told me I had a 19mm and a 20mm. Then I got a voicemail this afternoon saying I had recently ovulated and to call them on the first day of my next cycle. So, I’m not supposed to do the trigger shot tonight? No <a href="https://glowing.com/glow-fertility-program">IUI</a> Thursday? So confused and can’t reach anyone at the doc office after hours. Any advice welcome. Clomid was horrible for me this cycle, so hoping it was not for nothing. We had back up intercourse this morning. I have progesterone if I should supplement in case we get pregnant on our own?