positive opk 11 dpo???

So I believe I ovulated 11 days ago. Recently I've had SO much watery cm. Like I thought I started my period and was counting myself out for the month thinking I was leaking blood all over the place. Turns out it was just the cm 😅 I had a surge that lasted about 5 days and I was really thrown off by it. Could this just be a positive indicator that I am pregnant or am I actually ovulating now? I took a pregnancy test today with fmu and got a bfn so that's why I'm a bit iffy to trust the opk. Should I BD just in case??