I'm not sure about " clearly negative." Honestly, you are supposed to stop testing the day you get the positive, and count Ov as the next day. But who stops testing? I had 3 days of positive OPks. Like dark dark for 3 days straight. I counted the first day as the pos opk, the second as Ov day and the third as 1 dpo. I believe it was right bc I got my first positive hpt at 8 dpo, so I'm pretty sure I didn't wait to ovulate until the test went negative- bc then I would've only been like 5-6 dpo when I got my pos preg test. ( does that make sense?) sorry if that got confusing, but to answer your question I believe I ovulated and my opk was still pos that day. But I believe each woman and her hormones are diff, so yours may start to lighten tomorrow. Who knows. I would just dtd tonight and tomorrow and you're all good!