Brown Discharge at 6-7 Weeks Pregnant

Hi everyone. I'm new here! Not too long ago, I went to the toilet and felt wet below. When I wiped, I saw some brown discharge with cm. I got so shocked! As this is my first pregnancy, I'm so worried. ? I'm roughly 6-7 weeks pregnant. My first appointment will be on next Thursday. I'm not sure if I should call the hospital tomorrow to have a check. Did anyone go through the same thing? So far, I'm just experiencing slight back aches, morning sickness and a on and off slight cramping on my stomach. I'm so worried ?