Hello, Ive Been Trying For A While Now To Get

Hello, ive been trying for a while now to get pregnant but its not happening. Im 25years old and my partner is 26 both very healty! I just cant figure out when im ovulating, been trying the Clearblue ovulation kit but i never got a smile face just an empty circle! Im using few ovulation calculators and i quiet get the same answer. How many days after my period im ovulating? My last period started on the 2th of august 2015 when im more likely to ovulate?
Regards Chloe