Feel Pregnant one day and not the next... WTF?

Katie • 29 years old , married 03/10/2018, became a mother on 11/19/2018 to a beautiful little boy ❤️

I am 5 weeks 4 days today and due on Nov 23. My first ultrasound is in a week to verify pregnancy with a visual- I have several very positive pee tests and a positive blood test. It seems like some days I feel pregnant (tired, nauseas, moody, cramps etc) then other days I feel pretty normal... it has me freaked out that something is wrong... anyone else feel like this?