Extreme anxiety during first trimester

Andie
After almost 3 years of TTC, my husband and I are finally pregnant after our first cycle of <a href="https://glowing.com/glow-fertility-program">IUI</a> + Clomid. He is so thrilled and positive and excited. I, on the other hand, am so nervous and worried that I can't focus on anything else. I'm so worried that something is wrong or that I will lose this little life. 
My symptoms are extremely mild, which I've been told is normal for 5 weeks, but I'm just so worked up over it because it makes it feel "less real". We go for the first ultrasound a week from tomorrow, and I think seeing the heartbeat will help, I'm just so anxious in the meantime. 
All I've ever really wanted was to get pregnant and have children... And now that it's starting I'm so scared it will disappear. 
Can anyone relate? Or offer encouragement?