Need IUI advice?

Holly

So my clinic tells me to call before 10am with a positive opk to make my IUI the next day BUT If it’s after 10am I have to call the next day to schedule the day after wouldnt that be too late? Like with if I get a positive opk at 11am? How long does sperm live they told me they don’t do iuis before the positive opk cause IUI washed sperm live less then 24 hours! We have just male factor here no female factor at all!