Hi Philippa
Welcome to the forum, you might want to have a look at the following FAQ which explains where everything is
Welcome to Benefits and Work The answer to your question is yes, there is a chance. Send in any recent documents you have, do you have any supporting documents from when you last claimed? If you do send those in, especially if there has been no change in your condition. Do you have any family or friends who can write a supporting letter as to what support they given you on a regular basis.
We do have some very good guides to help you:
www.benefitsandwork.co.uk/help-for-claimants/pip Gary