Pregnancy advice!

So I found out I’m pregnant Sunday with my first child. I’m 5 weeks tomorrow, I’m absolutely petrified that I’m not actually pregnant etc (I’ve booked a private scan on the 21st to confirm) I don’t know why I feel like that I just want this baby so bad. I don’t really have any symptoms I’ve taken loads of test every kind of test you can think of all positive. I’ve not really been getting any symptoms. I’ve missed my period, I’ve had mild cramping, I’m beginning to feel more tired and every evening it seems to be that I feel extremely sick then I start to gag then I’m not sick. Can anyone help am I having symptoms, is it normal to feel like this.