Implantation or period?

Okay, so I am currently 11dpo right now and i had a little spotting yesterday. 10dpo). Could this be implantation? I had sex on the 25th of May but it was protected and no breakage or leakage happened. I was also not in my fertile window. The only other time i have had sex was this previous Friday and Saturday both times were protected and no breakage or leakage. Was also not in my fertile window then. Should i be worried? I am now predicted to be 2 days away from my period, would’ve been 3 yesterday. I have some breast pain, on and off cramping, and occasional back pain. What do you think?