Please help

Hi all after a bit of advise me and my so had unprotected sex last wed and Monday which were both days in my most fertile chart bit yesterday ( exactly a week after) I started having cramping in both ovaries and over the foof area this morning I have woken up feeling so sick and tired all day it's lasted also have noticed more smells than normal is it possible this is extremely early pregnancy af isn't due until 8th of Nov :/ please help xxxxx