What I read online...

So last month I didn't have a regular cycle. Brown spotting two days and then nothing. I've taken 5 pregnancy tests since then all negative. No AF this month yet. 6 days late. Cramping yesterday. I read all this stuff online about people not finding out they are pregnant until 3 months into it bwcauSe their home pregnancy tests are all negative and they finally go to a dr. Anyone else out there like me? I have an appt in three weeks...