Ovulation tests

Jay
I have been trying to figure out if I'm ovulating for over a year.  I am an endometriosis sufferer.  I find myself testing negative when my period apps tell me I should be ovulating.  When I get negatives it is always the one line.  For the past two months I've started to test the day after my period ends and I've been getting two lines.  Sometimes before.A bold and not so bold line.  I do this because I start feeling what is considered ovulation pains right after my period ends.  According to the package it depends on where the bold line is located for the result to end in a negative or a positive.  My results show negative per the picture.  When I test for 2 days after my period this is what happens and then on the 3rd day and so on I get that 1 bold line in which I know for sure it's a negative.  Can anyone explain why this might be happening?  Is it really a negative?  I'm so confused?  What should I do?  Are my hormones not balancing?