In many cases, a representative of Allstate will be one of the first people to contact you. This is especially true if you sustain injuries in an accident. In some cases, the adjuster might suggest that you sign a "release for damages." This is the time to err on the side of caution and seek legal advice before you sign anything. You may inadvertently limit the amount of compensation you can collect. You should seek counsel before signing any documents.
Do not mention your accident, discuss the process, or post any photos of the scene on social media. Your statements can be taken out of context and used against you. Seemingly simple comments like "I'm okay" or apologizing for an accident can severely limit compensation. It's better to leave determining liability and discussing a resolution to the professionals. You will obtain a better outcome if you work through your attorney rather than by yourself.
Negotiating with a major player in the insurance industry is not easy. Collectively, the industry spends large amounts of resources designing claims departments, writing policy and procedure manuals, and training managers and claims adjusters. It is rare that a claim against an industry giant like Allstate can turn out well for the do-it-yourselfer. Most claims are multifaceted and difficult to argue without the aid of an experienced advocate.