Nervous think negative

Ladies I been. Thinking to much I had a ultra sound done at 5 weeks 4 days just say a gestation sac and now today I am almost 8 weeks have a ultra sound in a few hours my hcg levels are doubling they are like 8,000something the last time I went but my POINT is I keep thinking negative like god for bid something happen to my baby because I don’t feel pregnant and many people had told me story about t what happen with them