Positive OPK's

Le
I'm curious if after you get a positive for an OPK and continue to do so for days after . Can you be pregnant ? If you are pregnant do they stay positive ? & if they go back to negative does that mean not pregnant ? 
I know it's not reliable but I've seen this happen on babycenter to multiple women who fell pregnant . 
I am starting my two week wait & I want to take more ovulation tests . Anything to give me am early sign ! These two weeks are WAY too long