IUI # 4 is going to be tomorrow

I went out and got CBE digital OPK's from CVS - it cost $ 40 - I went home and took one and the smile face came up which means I am ovulating - so I will call first thing tomorow morning and try and set up my IUI for tomorrow afternoon - that was easy than I thought it would be - now how to tell my bosses that I am going to miss another afternoon of work - is going to be the difficult part.