if it's an ovulation test it's not positive unless it's as dark as the control even if you see a line. If it's an HPT then it looks positive
Are you charting your temp? What cycle day are you on? I would keep using opks until you get a dark second line. Doesn't hurt to keep dtd every other day if you aren't sure when/if you ovulated. Your DH would probably be OK with that, too.