Freaking out!!!! WARNING!! TMI!!

Tara
OK so AF isnt due till sept 26th I have very regular periods I believe im 3 dpo or 4 dpo I have had this off and on only when I wipe since around 2 o'clock today what is this and I know sorta looks like AF right but 10 days early?? What could this be honestly I have a slight back ache nothing major I'm freaking tf out!!