This is positive right?? I dont temp! Im cd 15 but i neeeeever get a positive before cd18 so this is very strange!! Its the first one ive taken this month... Should i keep testing or not?? Can i go by the first positive opk will be ovulation (if i ovulate) in the next 12 to 72 hours right?? So bd now and the next 2 days?? Or more?