My last period started july 11 2012. and I missed my period in august I have taken 2 tests and they are all negative , and  Im not really sure whats going on, and Im so confused. Maybe someone could shed a little light on the situation. Im not on birth control. Im 23 years old and am sexually active. I havnt went to the Dr. yet I want to wait until I either start my period or I get a positive pregnancy test