
I think it can be positive when you're pregnant, it's even written in the instructions that OPK may turn out positive in pregnant or women in menopause.. But I'm sure that 4dpo is too soon for any test to show pregnancy. Implantation should occur 6-10dpo, and HPT may indicate HCG after 2-3 days or so after implantation. Best luck to ya, I keep my fingers cross for you
