Scared

So I found out I was pregnant in April. Got a blood test and confirmed but when I went in for my first ultrasound they saw nothing. They said the baby probably stopped growing early and I had a light miscarriage due to spotting. Well I took a pregnancy test last week and it says I'm pregnant again. I called and made an appointment. They asked the first day of my last period and they told me I'm probably 6 weeks and i set up an ultrasound for the 14th. But I'm really nervous because I'm super excited but at the same time don't wanna get my hopes up again. Anyone been through anything similar ?