13dpiui, should I test?

I'm now 13dpiui (20/6). My RE said I should expect my af today. I dont know wether I should test or not. I am so nervous. the last cycle of my iui, af arrived early at 11dpiui. This cycle the RE give me progesterone 400mg daily. My appointment with the RE is only going to be on 24/6 which will be 17dpiui. Should i just wait for the appointment with the RE or proceed to test today? Thank you so much for your kind answer. Baby dust to all :)