sky sorry you're stressing out.
The POAS website has this to say about negative opk's in their faq's:
Q: "I never get a positive OPK. Does this mean I'm not ovulating?"
A: "No, not necessarily. It can depend on how often you test. Most OPK's say to test once a day, around the same time each day. However, it is possible for your LH to surge and dissipate in less time than that, so testing only once daily may result in missing the surge. Here is an example of my OPK's for one cycle: On Day 14 of my cycle, I tested at 11:30 p.m. The test was negative (the result line is fairly dark, but not as dark as the test line.)
On Day 15, I tested at 10:00 a.m., only 10.5 hours after my previous test. By this time, the test was positive, and my LH surge had been detected.
Again that same day, I tested at 4:30 p.m, only 17 hours after the previous day's negative test. This test was positive; I was still surging.
And once again that day, I tested, this time at 8:00 p.m. The test was now negative, indicating my LH surge had ended-- and this was still only 20.5 hours after the previous day's test. Therefore, my entire surge lasted less than 24 hours. If I had not taken the additional tests, but followed the instruction to test "every day around the same time," I would have taken a test later that night and missed my surge altogether.
So, if you are unable to detect your LH surge, try testing twice a day! It is possible that you are not ovulating, of course, but this is not a conclusion you should draw based only on a lack of positive OPK's. If you still have concerns, talk to your doctor.
Incidentally, the length of your LH surge may vary from cycle to cycle. If you visit the OPK Odyssey, you can see pictures of my OPK's from several cycles prior to the one above-- in that case, my surge lasted longer than 24 hours, and I had positive OPK's for two days.
As a footnote, some ovulating women simply just don't get positive OPK's, like some pregnant women don't get positive HPT's (though both scenarios are rare.) The mysteries of the female body! :-)"
Maybe that helps?
Link here