Is this normal?

Hi all I’m just a worrier, I’m 12 weeks 1 day. My scan is on Monday. I’ve only had morning sickness twice throughout first trimester but I do feel nauseous everyday just nothing happens. I’m off certain food and drink etc and I crave certain foods. Have diaorrea depending what I eat. However the past two weeks I havnt been weeding like I did in the beginning as in i don’t wee as much, boobs less sensitive, don’t feel as pregnant as I did but I’m constantly tired. Is this all normal? I’m just worrying for no reason.

Please advise xx