I got my bfp 14 DPO. I tested at 11 DPO and got a bfn, I think I would have still got bfn's on day 12 & 13 too as the bfp was a faint line. It only became a 'proper' line at 16 or 17 DPO, I cant remember.
Symptoms, only really mild ones like mild queasiness and my bb's were more soild, but full symptoms didnt kick in until I was 6 weeks.
FX crossed for you xxx