Anyone else get injured on UA284 IAD-DIA and what to do?

During the landing of UA 284 myself, my husband, multiple guests and a flight attendant experienced injuries due to the rough landing. Medical had to be called for the flight attendant and we had to stay on the plane after being already delayed significantly. It was the most aggressive and egregious landing I’ve ever experienced. It felt like we legit crashed. It was such negligence on the pilots. I’ve contacted United but am trying to figure out what to do because the prompt says “we’ll get back to you in 30 days.” My shoulder, back, and hip are hurting so badly. It feels like I was in a car accident.

Have any of you ever gotten injured on a flight? What did you do? What happened? How did you resolve it? Did you seek medical attention? I’m nervous to stall on going to the doctor, but I’m also nervous about not getting the medical bills covered. Any advice is much appreciated.