Question.

Hey everyone I have never posted on here, thus is my 2nd pregnancy I have have a healthy 5 year old little girl. Friday I went to the ER for left pevels pain and turned out to be a cyst they said I was 6 weeks pregnant and the Baby was healthy. Today I went to the dr for a ultrasound the dr couldn't tell really how far along I was he thinks maybe 5 or 6 we seen the baby and the heart beat was 140. Then he said I had a fluid or possibly blood. So I'm really worried he said I have a % of miscarrying and I'm very worried. Just needed some advice or has anyone been threw this.