6wks no symptoms should I be worried?

I don't feel pregnant at all. If it wasnt confirmed with a blood test i would have not believed it. I get no morning sickness and the closets to sick i get if as soon as i start to feel hungry I will vomit however that has only started after i started my prenatal so i assumed that was it. yes i pee frequently but i drink a lot of water. Other than the missed period i dont have any symptoms.

Tender breast ... no

Morning sickness...no

cravings... no

food aversions... no

weight gain / weight loss ... no

i have cramps when i was supposed to get my cycle but after that i have not had any... I have an ultrasound april 26 and im just so worried that i wont see my baby because i dont feel pregnant at all. im honestly terrified being that i took me so many years to conceive and i finally have my blessing!!! I conceived the month of easter and will be giving birth in December (possibly Christmas) ... so is no symptom at all normal?