I've owned my Sony DSC-T100 for a couple of years

I've owned my Sony DSC-T100 for a couple of years now. I really have enjoyed the camera but off and on it starts to vibrate, it has a humming sound as well. the pictures comes out fuzzy and blurred. Doesn't do this all the time but seems to get worse over the course of time when I use it more frequently. used to get better after I would take one picture, then it would settle down and do one ok shot, the next one vibrates, next one ok. Right now no vibration. What is going on?