LH surge?

I have been testing for the last 5 days. the color in test line has been going darker and lighter but never as dark as the control line. I get pretty bad ovulation pain and know somethings happening but why hasn't the test line gone as dark as the control line? 
Pains started to get worse tonight so I just did an OPT, see picture. 
Help please. 8 months trying and I feel like I'm going crazy.