Anyone experience anything like this?

I’m 5 weeks pregnant after years of trying I go see my doctor in 10 days for my first ultrasound and I’m having this weird heavy feeling like pressure on my lower abdominal more on towards the right side ? Kind of hard to explain but there not cramps. Should I be concerned, I have had no symptoms until this. It started yesterday morning and it went away now it’s back? And feeling it a little more, could it possibly be a uti? I noticed I’ve been using restroom more often but can’t tell if it’s from pregnancy?