Has anyone been asked by the cashier if they are sure they wanted ovulation tests??

On two separate occasions I've been asked by the cashier if I was sure I needed the OKP not the pregnancy test?!  Both times there was a line of people behind me so obviously I was mortified. I already feel shamed that I have to do all this tracking to try to get pregnant and the they have to point it out!!  I said that is wasn't any of their business but I was aware of the difference!!!