MVA with concussion

I was involved in a MVA on October 1,2007 in Springfied, Mo. I was rearended as I was sitting at a stop light and then pushed into a truck in front of me. Upon initial impact I had no idea what had happened. I was so stunned. Anyway, turned out that I was rearended by a former patient that I had rehabed from Physical therapy. Crazy coincident!! This gentlemen was given a citation for hitting 2 parked vehicles. Anyhow, I was not taken to the emergency room because I initailly thought I was just shooken up. There were $3000 worth of damage to my car. Later on that day, I started feeling dizzy and I just couldn't hold my head up. I went to the ER that afternoon and was dx with a cervical strain. That night, I started getting really sick. I vomitted for the next 24 hours. I went to the ER the following night and was dx with a concussion following MVA. It has been 7 months since my MVA and still no settlement offer. I initially tried to get a lawyer and ended up feeling like I was going to get screwed!!! I felt that my concussion and other injuries were worth more to them, than to me!! Although my health insurance paid for most of the bills, I still have a balance of $300 at the hospital that went in to collections. I have paid the bill that went into collections so that my credit wouldn't get messed up. How long should this take and how much of a settlement should I expect? I am getting very impatient so I need some advice!