Is this really AF?!?

Sally
I was a month late! I took several pregnancy test and all were negative including blood work. I went back to the doctor and had an ultra sound done because I was having several symptoms but all my test were negative! I am a very regular person until now! I am not stressed and I have been off birth control for a year and a half. Well yesterday I had very light spotting and then today the spotting is a bit heavier? I go back to the doctor Thursday to see what the test showed. Is this really my period it's never this light? I'm so confused😕