Is implantation bleeding common?

I had sex with my boyfriend yesterday, he finished inside, and when I wiped down there it was light pinkish blood that came out. Nothing too much. I didn’t feel any pain during sex but we did go pretty rough. I’m about 17 days in my cycle, normally my cycle is 28 days. I’ve never experienced ovulation bleeding in the 9 years I’ve had a period. I honestly don’t know what it could be but I hope it’s not implantation bleeding…I don’t know if that’s rare or not.