So i had unprotected sex near my ovulation but if not on my ovulation date. Nothing about my body has changed and i was expecting my period about 2 weeks later and it came on the day it was suppose to with a normal full pad. It started off with light pink watery blood then went straight to dark red and went heavy the next day it didnt really went heavy it was in between.. im now on my 2nd day on and i think it will last about 3 1/2 days but this is unusal because my period lasts for 4-5 days and goes light on the 4th day and now im wondering if its implantation bleeding or what... i have medium size blood cloths from it... they say implantation blood isnt like period blood and this blood does smell likemy period but im not sure... can someone please let me know what is going on... :(