Light brown discharge at week 8

Oh don't worry, brown discharge in pregnancy is quite common and often nothing to fret about, but since you're worried and it's your peace of mind, I'd really suggest calling your gynae or going to A&E today just to get checked and put your mind at ease. Better to know for sure than to spend your Sunday anxious, especially when it's only one episode and could be something totally harmless like old blood or cervical irritation. Clinic can wait till Monday if they say it's fine, but getting that reassurance now will help you rest better.