WHAT IS GOING ON

So I'm a month late on my period (yes I had unprotected sex using pull out method & yes I know I should be using protection) I've taken 4 pregnancy tests and all negative. I have not had any spotting whatsoever or even any period symptoms. I would just like some kind of information or feedback on this because I have two full time jobs and have not had any time to go to the doctor.. I have no idea what's going on and I'm driving myself crazy over here please help settle down my anxiety lol