Bubbly feeling in the abdomen a normal pregnancy symptom?

I keep gettin feelings in my abdomen of bubbly and gas, i burp alot, but its not a stomach ache its more of pressure and also a pain at the side usually when i wake up. Is it normal to have tingling feelings in your while pregnant? I read you go tender and sore, Do they always go sore, or is it ok if theyre onl tender?