Help TTC mentions blood

I am not supposed to start my period until Tuesday. I went to the bathroom last night and when i wiped it was light.pink.and.this am when i went.it was still light.pink so i.put.a pad on. Now this is brown on the pad. We are ttc and i am praying this is early pregnancy sign. Has this been true for anyone or is my period starting early?? I am normally on a regular cycle.