Positive ovulation test after iui and right before period?!?!

J

Ok. I’m so confused. I had LH surge on 07/15 and <a href="https://glowing.com/glow-fertility-program">IUI</a> ON 07/16 and from the scan my fertility dr said it looked like I had JUST ovulated so it was perfect for <a href="https://glowing.com/glow-fertility-program">IUI</a>. So we did it and BD twice that day for extra measure. Anyways so here I am in TWW with AF supposed to be here on Monday and I have sharp pains in the opposite ovary so just randomly I decide to take an OPK test and it’s POSITIVE for an LH surge?!?!? WTF? You can’t physically ovulate twice in one month so what is going on??