+OPK as pregnancy test?

Juliette
Here's the background.  I'm 6dpo and have been feeling off since 1dpo.  Currently today I had constant waves of nausea to the point I puked twice.  Can't seem to eat anything heavy since 4dpo.  Cramping on left side ovary very night and started vivid dreams two nights ago.  I'm trying my hardest not to ss but it's so hard not to notice these changes.  Well tonight I took this OPK and it looks positive.  Just peed 20 mins before and had to pee again so decided to test.  Not so concentrated urine obviously, but enough for this!  Did anyone get positive OPKs before their BFP ?