Still worried

Went to maternity last night cause I got brown discharge and then pink when wiping. They done a scan and all ok and said the discharge is normal. As long as it's not red, heavy and like a period. They want me to go back on Tuesday morning for another scan as the machine they had for the scan last night was not a good one. I'm still having brown discharge today not a lot and not on my knickers only when I wipe but I'm still worried xx