Pregnancy after miscarriage

Ontwania

So my fiancé and I had been trying to conceive for a year after losing our twins. I found out I was pregnant 3 months ago and I lost it shortly after. I just took a test today after being 5 days late and it came back positive. Every since then my anxiety is really acting up. Like I’m so scared I’ll lose this one as well. Is there anything I can do to ease my mind. I just don’t want to go to the er just to find out nothing is wrong