Anyone else??

I stopped taking my pill last month around the time of my period which was June 1-5. We began TTC right away. We logged, and went to town doing the deed every day! ;) This month my period is 5 days late (which it NEVER is) and I recently had some brown spotting the past two days. Today it was a little pinkish. I read about implantation bleeding and it sounds similar to this, but I have taken 3 pregnancy tests and all are negative. I have also read stories of people having the same thing and it took up to 8 weeks for them to have a positive pregnancy test! I know I'm probably being impatient, but do you all have any insights or advise?? Thanks !!