What in the world?!

I got a positive opk on oct 18th ok i BD all i could and I was waiting for my tww. Sooooo yesterday morning I was having a very watery clear discharge here I thought it probably had to do with implantation. I decided to take a opk last night around 10pm because that discharge I had in the morning was getting to me. And Guess what!? Bfp opk again?! Two weeks apart!! I took a pregnancy test this morning its negative. Is it that my body didn’t ovulate the first time? I never had a watery discharge the first time i got a opk

First pic is the first positive i got. Oct18

Second pic is from last night