Depo and Ovulation

I was on the depo injection for a long time and my last one was September last year. Since I've been off of it my periods have been all over the place; regular period, then nothing for 60 days, bleeding for a month etc.

I've taken a couple of ovulation tests in the past few days and they've both come up with a faint line. I've never had any sort of line before. I know this isn't positive as the test line needs to be darker than the control line, but my question is this:

If I have a line on my ovulation test now, does that mean I am actually going to ovulate this month?

Thanks for the help