Very worried...

So a month or so back I got really sick with a bladder infection that I'm almost sure went to my kidneys. Well my right one anyways. Ever since it still aches where my right kidney would and my doctor thinks I may have had a stone. I was told that my kidney and liver panels were normal and that my ultrasound was normal as well. Recently I have noticed bubbly urine. It doesn't cover the whole toilet bowl, the bubbles do go away after a while, they are also clear and bigger in size (dont look frothy like on beer). I get UTI infections from sex all the time too. Well, if I don't clean up and I've had two kids. I have had recent urinanalysis and it's all came back normal. I just don't get it. I also have Hashimoto's. What do you think?