Spotting 2 days after cycle

Hello, my cycle went off this Monday and yesterday (Wednesday) and today I have light pink spotting and I know it's not implantation bleeding. I had sex with my SO Tuesday as well, I've been with the same guy for the past year and I've never spotted afterwards. Have anyone had this to happen?? I had a MC in June and I know my cycles haven't been the same since then but I was curious to know if another woman has experienced this.