morning sickness

I'm currently 6w2d! For about a week I was sick to my stomach. Could not eat full meals, and barely kept down even crackers. All day everyday. This morning I woke up starving and feeling completely fine! No nausea, I slept through the night, and have felt fine today thus far. I've read it's not good for symptoms to just disappear 😭 I'm really nervous. Is it normal to feel okay and have the sickness subside?