4-5 days late

I am currently 4/5 days late on my cycle. I am on cd37, usually i have 30/31 days in cycle. I have been having excessive CM (white creamy), and slight cramping in my groin area (different from my period cramps). I have PCOS, and have been taking more vitamins/herbal teas/Geritol for the past month. I have been late in the past but never this late.

Honestly I’m terrified to test too early due to past negative results. Should i go ahead and test or wait until 1 week late (which will be Monday, 3 days from now)