Need answers period or pregnant

Not sure what’s going on we’ve been TTC and my period was suppose to start about a week ago and I got nothing so I tested and got what could of been a very faint positive or a evap. I’m having these cramps on and off and what feels like a flow is coming down and I keep thinking it’s my period so I didn’t bother testing again but for the past week it has just been light brown and dark brown Discharge thinking of going to the doctors could something be wrong?