1dpIUI u/s

So I had to go in for another u/s this morning to make sure the follies released. They were gone! So I ovulated sometime after the IUI yesterday. So I am now feeling hopeful that things were timed correctly. Still no idea why my temp spiked before I actually ovulated. Its a mystery. Maybe a slight fever? My temp throughout the day yesterday seemed slightly elevated than normal. It hung around the low to mid 99's and I am usually a low to mid 98's girl. Or it could have just been a fluke. My RE does not seem so concerned about it since we confirmed O day with u/s. Can't get much more definite than that. So now we wait.