How do I proceed? A company has offered $5000 settlement for a June injury. Surgery to fix was in Sept. 3 mos of PT. Get an attorney?

Tripping in a parking lot hole caused a fall jamming and damaging my shoulder. This shoulder was rebuilt about 22 years ago. This current injury caused torn rotator cuff, torn biceps tendon, and other maintenance was done during the surgery (arthritis etc.) There were 3 months of physical therapy. Dr. says pain won''t be gone for about a year. I have talked to the company and they have offered to pay $5000. Bills have been paid by my insurance. I paid co-pays. If I take $5000 I must sign off on the injury and pay back the insurance co. Looks like they paid about $25000 to $30000. What do I do now?