Period due in 4 days but just got a positive opk

Emily

I took opk yesterday (CD27) because I had symptoms which I thought was a bit weird. So it was very close to positive so I took a pregnancy test today (CD28) as I saw that opks can ge positive when pregnant. Last month I ovulated at cd19 so I don't know if I should keep taking opks just leave it for a few days and see what happens.