Spotting, implantation, or really light period? To test or not to test...

Melissa
Last period began June 19th and lasted about 8 days... Technically my next period should have arrived around Friday the 17th (though I went off birth control in April and didn't get a period at all until June)... Did not get anything until Friday July 24th (one week late) and it was just really light brown spotting... Had a tiny bit on Saturday (yesterday) too but that's it. Could I have ovulated late/have a long cycle and this be implantation bleeding? Or likely just a light period? Trying not to get my hopes up... Help!