Why so long?

I just found out I’m pregnant a few days ago, went in and got confirmation from my doctor and she said I’m 5 weeks along. BUT, she won’t schedule me for my first ultrasound/appointment until August 28th. THATS OVER A MONTH AWAY! Does anyone know why she would wait until I’m like 11 weeks to even attempt to make sure everything is okay? Has anyone ever had to wait that long? With my son I got an ultrasound at 6 weeks. I’m confused and kind of don’t want to wait that long to make sure everything is going okay. It’s giving me anxiety.