Help pregnancy anxiety !

Hi mamas!

I’m currently 5weeks 5days. This pregnancy I’ve been nauseous for about an hour in the morning then nothing but dizziness, lower back aches and a constant hunger this is exactly what it was like with my daughter but with my sons I was in and out of hospital for needing hydration and anti nausea medication so I could function so what I’m getting at is it freaks me out that I’m not insanely sick and I worry that my baby isn’t okay

How do I stop the anxiety and stop worrying about my baby?

I’m now having nightmares that I’m giving birth to twins and one doesn’t make it I’m terrified and I think I’ll be terrified for the next 9 days until my ultrasound and see a heartbeat

Should I goto the hospital and get an ultrasound for the end of the week or wait?