Could I be having implantation?!

I started having spotting the 14-today. It is brownish with mucus super super light and only when I wipe. I had unprotected sex the 8th and 12th but I’m worried about the 8th. I’m on birth control also but I missed Friday and Saturday pill. I heard it take 6-12 days after intercourse for implantation. I’m just wondering if y’all think I should test or just wait it out or what?