My expected period was 8 days ago, according to the Flo app. I have had unprotected sex on July 2nd, 5th, 9th, 16th, 17th, and 24th. I am currently experiencing 6 days of light bleeding (spotting) and mild cramps that feel different from my usual period. I read on healthline.com that in most cases, implantation spotting only lasts a few hours to a couple days, but some women report having implantation spotting for up to seven days. Also, i have breast tenderness and vivid dreams. Could this be implantation bleeding?