When should I test?

Ashley

I am not sure when I should take a pregnancy test. I ovulated on the 17th or 18th, I have never been pregnant before? I have some mild cramps on and off for the past week, I have gotten light headed twice while eating (which never happens), and I have not had any implantation bleeding. Idk if I am just over thinking it because my husband and I are TTC. When do you guys think I should take a test?