UPDATE: How much bleeding is too much?

Started bleeding tonight. Enough to stain underwear but not need a full on pad yet. Very pink. One tiny clot, the rest just thin blood. However, I havent had bleeding other than this during the pregnancy. I'm 6 weeks and 6 days. Preg test was still strong two days ago at the dr office. For those who have had previous losses, what was your progression of symptoms? Anyone have this and not miscarry?

**Update: went for an ultrasound today. Baby is doing fine! Heartbeat of 127.