Advice - cervical mucus and clot at 6 weeks

Claire
Hi, this is my second pregnancy, I miscarried before at 9 weeks which started with the discharge of a large blood clot. Last night I had a discharge of mucus, just like what you can get during ovulation, with a small brown clot inside it. My immediate feeling is that it's the start of a miscarriage. I just wanted to see if anyone else has experienced or heard of this and what their outcomes were? It feels very frustrating just waiting to see what happens next. Thanks all