As has been explained before your claim is divided into two sections
General damages covers the actual injuries as well as pain and suffering, and each category will have a value according to whether it is minor, moderate or severe, although you only get one pain and suffering payment.
Then there are special damages which covers all you other costs such as loss of earning, out of pocket expenses, damaged property and so on.
No one here can give you a specific value as we do not know the details of your case, the type or severity of your injury or whether there is ikely to be any long term problems which can also affect the value of your claim. This will only be determined once you have had the examination by the independent medical expert.
In the case of severe injuries, then something called the Ogden table will be used which over rules the JSB Guidelines, and so the only person who can give you a valuation is your solicitor who is privvy to your case notes and your medical records.
He should have already given you an estimate of what your claim is worth, no one here can thats for sure.