Ovulation test, 3rd day in a row cd21. What is happening? Tested negative all month until these?

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This test is negative. The left line(test line) needs to be as dark or darker than the right line (control line) 
These are mine for example. All of these are negative except the last one is positive.

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This test is negative but looks like your getting close to getting a positive OPK. Continue to test twice a day until you receive a positive, dark as or darker than the control line. Good luck!

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Still a negative ?

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It's still a negative. Keep testing and hopefully the line will get darker. I test in the am and mid day. Good luck!