light pink blood ?

8 days after we had sex there was a little bit of very very light pink blood when i wiped after peeing. but no more than that. that day was about 5 days ago and i’m supposed to start my period today but nothing yet. i usually never spot so this is unusual and it was so light. do you think this could have been implantation bleeding? 🤞 i will test in a couple days but just seeing what you guys think.