Early pregnant.. doctor, bring morning urine?

Hi everyone!

I found out on Saturday that I'm pregnant.. this morning I took another test just to be sure and yep, a big plus.
It wasn't planned but it is welcome.
I also don't know how far along I am when I enter the calculation on the internet based on my last period; I'm currently 5 weeks pregnant.
So I have a question..
I took 2 pregnancy tests, both positive..
Last week I happened to have an appointment with the doctor because I had a very restless stomach, probably my intestines.. there was nothing to see, no pregnancy either.. but it's probably still too early.
So I have an appointment with the doctor tomorrow morning and he wants to check my morning urine..

Is this common?
This is my first pregnancy and everything is a bit nerve-wracking, which is why I'd like to know if others have experienced this?