So I know when you get a positive opk that’s your phone surge and they say to have sex 1-2 days after but what if the next day the o test is light again. Does that mean you ovulated and are no longer fertile? Or does that mean the egg is still waiting? Can someone explain this to me please. For example I got a positive test last night but now the line is not as dark anymore so does that mean I am no longer fertile or does that just mean the surge is over?