PCOS... Scared to test.

My period was due 2 days ago, it's been super regular the last few months with my phase being 13 days and my cycle being 26days long with 4 days bleeding on average... Problem is I have PCOS. So It could just be my cycle stuffing up. I'm so scared to test. :( I've been super teary lately and expected it to be PMS but my period never came and glow hasn't been wrong once since I got it a few months ago... Someone pls help :( I don't know if I should test or not