Thank you all for your replies.
Yep I think you understand what I am getting at. Except that I actually think it moves because when I stand up from what ever position I was bent in, it does take a good 15 seconds before I feel it 'pop' back into place.
Very weird! Just glad its not painful
I will certainly see my doctor (when I finally get an appointment!) It doesn't happen every time I bend over, just sometimes and it doesn't effect my eating, but you are right, I do need to see my doctor. Because I had my band put in on the NHS (sooo grateful!), it means that I only see my doctor about twice a year, maybe 3 times if I'm lucky.... been waiting about 6 months for an appointment so far...