Brown discharge week5

Ni2 ❤

I have a brown discharge from morning. As per the app I turned 5 weeks today. I also found that urine did not flow freely even after drinking enough water (though it was only once for the day) I dont have any other preggo symtpoms. From morming I have a mid backpain and that is because id the posture i sleot yday i guess.... my doctor said she wants to scan. Can scanning this early be a problem? will this brown discharge a prob?