TWW and antibiotics!!

Danielle • Currently TTC #3 with my soulmate 😍😍😍

I am 9 DPO today and have to start taking antibiotics tomorrow for second/third degree burns. The doctor is fully aware that my hubby and I have been TTC and kept asking to confirm that I am not pregnant. Since it's too early to test to see if I am or not, there's no real way to know, but I do feel that I'm not. Should I go ahead and take a pregnancy test tomorrow morning before starting the antibiotics or would it be a waste of a test?