Is this a sign of pregnancy?? Please answer??

I have been buying ovulation test because my partner and i are trying to conceive and i tested all this month and last month! And i ovulated last month but not this month and my are sore and i calculated the the dates on which i should be ovulating and I wasn't all the test were negative and iv had this weird smelling discharge as well on the max day of my ovulation but the test was negative and i had no ovulation pain or twinges like i usually do when i ovulate! Could it be possible that i didn't ovulated because im already pregnant??