Last Cycle Before HSG

I'm 11 days past ovulation on my last cycle before I schedule an HSG to check to see if my tubes are open. I'm having some symptoms, but they could be symptoms of pregnancy or an impending period. I'm going a little crazy, scrutinzing my charts every day when I enter a new temperature. I know a lot of people would just go ahead and take a pregnancy test, but I just can't handle seeing one pink line. If my temperature is still high on Tuesday, I may break down and test. This cycle is due to end on Wednesday, so it would just be a day early. I'm trying to stay positive, but not let my hopes get too high. I wish I could enjoy this more.