Hi, On The Morning Of February 13th, I Had Unprotected

Hi, on the morning of February 13th, I had unprotected sex and took postinor 2 about 5 hours after. I took both pills at the same time rather than the recommended way of taking them. It's been a few months now. I have received my periods on the regular every month. Today, I noticed brown discharge that was odorless which as I learnt could be an indication of early pregnancy. I have also been gaining weight rather fast and my breasts have increased in size. Please advice. Thanks