When should I test ?

Hello ladies my name is Tee. I have PCOS & my periods are very irregular. The end of June I was taking Provera to induce my cycle then AF came July 5-10 , on July 9-13 I took 50 mg of Clomid. Today is Cycle day 20 and I go to get blood drawn tomorrow to check my progesterone levels. Last week which was July 16-22 was supposed to be my fertile week and I BD everyday, I had some mild cramping 3 days last week, I didn't use a opk because I didn't want to be stressed out about not ovulating so my question is when should I start taking a pregnancy test to see if I'm pregnant. Mind you my cycles are irregular. According to glow my next cycle should start August 2nd & im not sure if it's going to come anyways because I'm so irregular. Ladies help me out. Good luck and Baby dust to all.