Thank you for the information, however, your question are a bit unrelated to each other so I am not sure exactly what you are asking. I will do my best to address what I see in terms of your questions with the limited information I have, but please feel free to expound on the facts or your questions if I haven't covered something you wanted to ask.
First I see that you say you want to be "paid for sick days too." I don't see where you say in addition to what, but if you are asking if an employer in CA is required to pay for unused accrued sick leave when an employee quits, then the answer is no, not unless your employer provides for payout or unless your vacation leave and sick leave are lumped in together as PTO. In other words, CA law requires that an employer payout unused accrued vacation leave and PTO (where all leave is combined), but not sick leave. You can see a restatement of this information at the following link: http://www.dir.ca.gov/dlse/Paid_Sick_Leave.htm
As for compensation for your injury, the only form of compensation that the law allows for in workplace injury situations is workers compensation. Hopefully you filled for that and received WC coverage and ultimately a settlement when you reached MMI. That though is the extent of your right to receive compensation for workplace injuries. That is because of how the WC laws are written as the "exclusive" remedy.
Finally, you mention being written up. There is nothing unlawful, generally speaking, about being written up by your employer even if the reason is misguided or just plan wrong. The only exceptions are if you have a bargaining agreement you work under that they violated (in which case the union could help you file a grievance) or you were targeted for adverse action simply because you are a member of a protected class under employment discrimination laws or because you filed an WC claim. In the latter cases you would have to file a complaint with your HR Department and then if they could not resolve the issue, you could file a complaint with the CA DFEH.
Please feel free to ask for clarification or clarify your questions. If none is needed, then if you could take moment to leave a positive rating in the box above, I will receive credit for assisting you today. Thank you