need advice about possible 2nd miscarriage

Hello! I had my first miscarriage at the end of January '15. I went to the er at 6weeks and was told the embryo stopped developing at 5 weeks. I had very light spotting for a week leading up to my er visit. Only brown and no pain. When I saw my obgyn a few days later she was very brief and dismissive. They only ran one blood test to check my levels and that's it. No follow up no more appointments. I was told "it's common and you're fine." so my husband and I tried again the next month. Got pregnant again right away. I was feeling way more pregnant this time. Lots more symptoms. But today I am 6weeks and again I saw light brown spotting for the first time. I have no idea what to do. Any advice or suggestions are appreciated.