Brown blood? 5 weeks PG

Stricken

Did anyone have this symptom? I had a miscarriage this June and and recently pregnant again rainbow baby and 30 mins ago I checked my pantyliner and it’s a brown color??! I do have cramps but I’m scared my period was due the 23rd so not sure if it’s late implantation!? I’m so scared I can’t go through another miscarriage again 😞