IUI and opk

Cortney • I`ll be 25 in just a few months. Graduated college now ready for a family. TTC SINCE JANUARY

So my dr told me to use clear blue digital opk and call when I get a smiley. Well this morning I had a flashing smiley, called my dr and waiting to see when they can get me in.

My question is how many high days usually before a peak day? Because if I don’t get a peak till the weekend I will be out for sure this cycle.