Just had my period on the 8th and it lasted for three days very light when I'm usually 7 days and somewhat heavy I had sex on my highest fertile window time which was the the 23rd (Didn't use protection) and now I'm wondering if maybe this is implantantion bleeding? I took a test yesterday came out negative I figured it'd be too early to tell but tried anyways any help would be greatly appreciated I just want to know what's going on with my body