If you have already gone through your insurance company and not notified them of any personal injury then as far as they are aware then you do not wish to claim. You do have 3 years to claim though and sometimes injuries can occur a long time after the initial injury, this shouldn't be an excuse to suddenly pick up the phone and claim, but if you genuinely think you are hurt, or anything happens in the future you have every right to claim.
We are a claims company ourselves and we can tell you first hand that the phone-call you will have received will just be a company "pushing" you to claim, something which is rife in our industry, and definitely something a decent company would not be doing.