Spotting before period - normal or hormone problems?

I’ve been ttc baby #1 for 7 months now. I’ve been using opks and temping so I have a good idea of when I’m ovulating but no luck. 😔 I’ve noticed that I start spotting the 4 - 5 days before my period (starting about 8 - 9 days dpo). Could this be a sign of hormone problems? It worries me that my “pre-period” spotting starts when implantation should be happening! Has anyone had this happen and still conceived?!