Cramping at end of period, cancel dye test on tubes?

[Lyn84]

I have started sharp cramping in my pelvis last few days am due to go for dye test on tubes on monday i plan on going to dr on wednesday to try to rule out infection, not sure if im being paranoid about infection or it could be my endo flaring up but i don't normally get a flare up at the end of my period its usually when i ovulate ive waited 5 months to have dye test as ive had so much trouble getting the appointment do i cancel it or chance it? As i would get the results of possible infection back until next week other than pain im showing no other signs of infection, its my last test before starting ivf