Should I test?

I was due to get my period on the 11th (yesterday). On the 10th I had some light brown streaks on my panty liner. I assumed I was getting my period. When I woke up it was back to white. I have been dry with occasional light brown spotting. Could it be implantation spotting or just due to get my period? According to glow I ovulated around June 29 and I did have unprotected sex.