A little worried this will be my 1st baby

Amber
I'm currently 3wks and 5days pregnant. This will be my first pregnancy, this morning I noticed brown discharge when I used the bathroom. I was just wondering if this is normal at this point in the pregnancy? And has anyone else experienced this? I don't go in to see my OBGYN until the 29th of this month should I go in sooner? TIA!