Bleeding

So I had my first miscarriage at 8+3 in September which I had a dnc. I am now 5+5 weeks pregnant and last night I had some bleeding. It was not much but bright red in color and I have non since. With my last miscarriage I never bleed just had the dnc so I am just wondering if this is how miscarriages start. Do you start bleeding a little bit for a few days and then does it pick up or was the blood possible from something else. I called the doctor but they don’t seem too concerned since I am still early so just waiting for a call back. Please help!