First baby worries and major overthinking-HELP

Hey! So NYE I found out I’m pregnant! We’re over the moon after TTC for some months! This is my first baby and I’m a natural worrier plus the fact it’s the school Christmas holidays and my mind isn’t preoccupied with work! Just want to know is it normal to have barely any symptoms?

I have slightly tender boobs (left more than the right)

I had a stinking cold and cough over Christmas that is on its way out

Feel like there’s ‘something’ in my lower abdomen but it’s hard to describe

Hubby said I feel ‘swollen’ inside

BUT...

No discharge

No cramping

No spotting or any form of bleeding (late/no period was my indicator to take a test)

Not feeling nauseous

No fatigue

Panicking that I should be feeling more. I’m very rarely ill and already eat very healthily and go to the gym 3 times a week! If correct I’m 5 weeks along!

Also do I call my doctor or local hospital now I have 4 positive tests-internet is conflicting (I’m from the U.K.)

Thank you ☺️