First time mummy and worried about spotting

Have anyone of you experience spotting for like more then 10days. I am at the week of 6 and 1 day. I have went to kkh and was being told that that is old blood but Dr skip my question when I ask if it's common. I am not sure what to do. My spotting is not alot and I do not feel pain or uncomfortable is this normal or should I see a doctor again #pleasehelp #advicepls #firstbaby #1stimemom