13 weeks most symptoms gone?

Hey ladies I'm 13 weeks 3 days and this week I've noticed that a lot of my symptoms are gone? No more nausea or feeling just real sick. I'm able to eat different foods compared to before where I was only eating like 5 or 6 different food items because that's all I could stomach. The only symptoms I still do have is frequent peeing and sore nipples. I had really bad headaches and mood swings at week 12 but that's all gone now too and now my anxiety is getting to me. Is this totally normal approaching your 2nd trimester? I have an ultrasound tomorrow so I'm just super nervous 😩