Brown spotting at 4 weeks

Sarah

Please please give me your input. I am about 4 weeks pregnant, give or take a few days. I got a positive pregnancy test on the 17th of January and have since been experiencing brown spotting. Is this normal? Or am I miscarrying? My doctor can’t get me in until next week and I’m just not sure if it’s something I should go to the E.R. about. Thanks so much.