I came on my period 2 days ago and me and my partner still have sex whilst I'm on my period, we had sex last night and blood came out after but not during sex as I wasn't on heavy, when I woke up there was nothing in my tampon but I changed it anyway and put another in and 4 hours later there's still no blood? What does this mean? I'm usually on my period for at least a week to 8 days?!