Advice please, super confused....

I have never been pregnant so I have no idea what's going on with my body right now.  My last normal cycle was June 2. I skipped my period in July, and still haven't had one this month. I've had some very light brown spotting the past 2 days, so light I don't even need a pad, it's just when I wipe. I've taken 7 pregnancy tests between July and now and have all been negative. I scheduled an appointment with my dr on Friday, but I'm so frustrated. I want to be pregnant. Is it possible I am? Has anyone else ever been 2months late and still gotten negative results?