When to test??

Heather
I'm on my third month of Clomid. I'm on 4dpo now or cd 19. I know it's way too early now but my dr says day 30 to test, but the past 2 months I have only made it to day 26 and day 28 before I had a period. Blood work confirmed ovulation both months. I am hopeful this month. I am nauseated and my boobs are hurting so badly I can't take it right now. Are these good signs or am I just crazy? I have endometriosis and pcos and this is just trying for my first child. It's been over a year and I am honestly worried about not being able to.