The problem is that you are not going to get a big payday out of this. Therefore you are not going to get an attorney who is willing to take it on contingency. Therefore you would have to pay the attorney upfront, and its unlikely that you would get enough of a settlement to make it worthwhile.
I know its frustrating and wrong that you went through that and if you have enough money and its important enough to you to press forward even it costs you more to do so than it gains you, you CAN move forward with it. I have known people who have done so in similar circumstances. However it doesn't sound like you have the money to waste on something like that.

