Did you pay any costs on account for anything and have you received any interim bills or statements?
You should have received a Rule 15 letter from any solicitors acting for you setting out the anticipated costs of the fees and disbursements (eg insurance policies, medical reports, disclosure fees, court fees) and how the fee element works eg a conditional fee arrangement, for the case which might assist and no harm in asking your legal adviser as to the costs incurred to date.
Is there any chance of settling for a lower amount to get out of the case that way?