Sharp pain near left Ovary

[onemorebaby3]

is that a sign of ovulation? according to my phone app I was to O 3 days ago, have been testing for 6 days and still lines are not dark enough. Had a really sharp pain near my ovary this morning took a test at 9am, was dark but like I said I dont think dark enough, took another around 2pm and it was much lighter, any thoughts???