What should I do if I feel i was unfairly laid off?

Due to the economy..lol, right!!! I was laid off from my job a little over a week ago. I have been with the company many years and I had worked really hard to make sure the customers were always satisfied. A couple of years ago i was in a car accident that left me on disability for several months due to surgeries and healing and what not.. The company does yearly reviews on their employees nad I was employed for 2 years before I received a review and it took them several months to give me my raise from it. All of my reviews have been excellent and "exceeds expectations" After my accident they put in my review that I was lacking in the attendance department. Because I was raised in a manner that is not roll over and take it, i fought them on it telling them it was a personal matter and it should not be relevant in my review as it was more than explanable and unavoidable. I was given another review shortly thereafter for some reason that was back to "exceeds expectations" and I have a copy of the email from my boss that was sent to me with a copy of the review and her word that she make sure I received proper compensation for my title. She never took care of this. so when we got a new boss I forwarded him the emails and he said he couldnt help me, so i again fought the system, and he told me in january of this year that he would review it with his boss and he would get back to me within a few days. This was never brought up again. I was moved into a new position..the third time this happened to me.. without a title change or a pay increase.. I also found out that new, inexperienced people that I had trained made alot more than I did and I had been there for years... People I had trained were awarded promotions that I had applied for and they hadn't, and when I was finally moved to the last position I was in, I was replacing someone who was making around $10 more an hour than I had been,, but because the company has a hush hush policy on speaking of the pay scale, I was unable to let them know I was aware of her pay. (If we are caught speaking about our pay we are immediately terminated) Well I was pretty ticked off after being laid off, but then I found out this week that not even a week after they let me go they hired on a girl that was working as a temp for our office that had been let go a few days before me. Now if they told me that I was laid off for reasons pertaining to the economy and they reviewed my attendance record (every day i took off was a scheduled vacation day or I brought a doctors note) and my performance (i already mentioned my performance as stated by the boss "exceeded expectations".. then why would they let me go and hire the temp they had also let go, shouldn't they have just moved me into the position theyhired her on for after letting me go... I just don't know what to do.. should I speak with an attorney about this.. i don't want to sue them.. i mean i do, but not for the money... because they are dirty a holes and they ahve done me wrong for 4 years and all i ever did was try my best to get my work done in an efficient manner.. I really did do my work very well.. there was absolutley no reason other than personal dislike for them to lay me off.. what should I do here.. my feelings are hurt, I know Im better off not working for a company like that, but I dedicated so much time and effort into that company and they cut me like I did something wrong.. I want justice.. they were wrong, they just didnt want me around because I fought for what was right instead of rolling over.. if I should find a lawyer..how do I find a good one? Im in california by the way