Hi, I Am A 45 Yr Old Female And For

Hi,
I am a 45 yr old female and For the past 24 hrs. I have been experiencing a fluttering or for a better word a vibrating sensation in what seems to be my bladder. The flutters are about 3 seconds apart and are constant. I have NO pain or discomfort in abdomen, nor when urinating. But my lower back is hurting me rather bad. And The flutters are more annoying and distracting than anything. I feel concerned and just wondering what or how serious these tremors in my bladder are? And what brought them on so suddenly? And What are some things I could do while at home to ease up the tremors, until I can get to a doctor. Thank you!