Ok this person didn't have to be so rude but what she said about miscarriage is true. My doctor saw me at 8 weeks with my first and said "now if you start to bleed or anything just call and let us know. Miscarriages are common in the first trimester." I was upset but it's the truth.
All we can do is know that our bodies know when something isn't alright. Everything happens for a reason.
I'd say get another dr if you want but more than likely they will say something similar. Maybe in a more gentle way.
In any case, much love to you and your family.
Happy Holidays!