IUI and labs

I was supposed to start clomid today to prep my body for IUI. I went in for my baseline ultra sound and lab work. Weeelllll they called and said my progesterone was to high. They said I need to come back on Wednesday to test again. If it's still to high we will need to talk about a different plan ... Ek. I'm nervous now! Has anyone experienced this? What would another plan be? Thanks