Do I need to hire a lawyer to file a claim with my own insurance company?
Yes. You should file a claim with your own insurance company. No. You do not need a lawyer to do so.
No. You can make up your own claim. Hire an attorney if you don't get a fair settlement.
Not if they cooperate
Obi Wan Knievel
You can, but you don't need to. Usually, people only hire a lawyer when disputing their claim in front of a judge. And they very rarely win. Insurance companies are greedy and underhanded, but they're also very not-stupid. Any claim can be settled in front of a judge any time, and they all know it. That's why they have whole teams of ruthless lawyers working for them full time. If you do hire a lawyer, hire one who used to work for an insurance company if possible.
Need? I did, the insurance companies are professional deniers, I needed a professional to represent me.