Accident - broken spinal how big compensation claims who to make?

I was injured in road accident. Few month ago I was hit by a vehicle on zebra crossing. Car drive very quicly and driver was under the influence of alcohol. An accident was very tragic event for me. I was 4 month in the hospital. I broke my spinal. Now I need rehabilitation, I can't continue my work. I have to take strong pills and medicines. I can't live normal. I need help in trivial acts. I have a psychic problems too. Can I get compensation? but i need your help because I haven't idea how much should I claim? What kind of documents should I arrange? Shuld I get solicitor?