I hear a thumping noise when I am driving .

Sounds like something has come loose in your suspension. Best to let a reliable shop diagnose the problem before it causes you to have a serious issue develop.

Without a better description of where the noise seems to be coming from, and under what circumstances it is there, it is impossible give a reasoed answer. For example: Is it effected by speed-getting worse when going fast and going away at very slow speeds, or vice versa? Can yoiu feel it through the steering wheel, or only hear it? Is it there only when the transmission is in a certain gear? Is it only there when you are turning and if so does it matter how sharply you are turning? Is it there when you first start driving for the day and it soon goes away, or vice versa?