What is my recourse if an ER doctor failed to diagnose my injuries?

Question Details: About 2 months ago, I fell off of a ladder that was sitting on a elevated porch at a new home build construction site. The fall distance was approximately 15-18 feet. I busted my head open and sustained a leg injury, as well as bruising all over my left side. I was taken to the ER and the attending doctor sent me for X-rays of my legs and a CAT scan of my head injury, no broken bones. The doctor stapled my head injury closed with 12 staples and sent me home without addressing my leg injury. I returned to the ER 12 days later, and had the staples removed. I then asked to speak with same doctor who saw me the first time. When he came in I asked him about my leg injury. He glanced at my leg and stated that it was an infection, prescribed me antibiotics and told me to follow up with a workers' comp doctor. After taking the 10 day supply of antibiotics, I went to the workers' comp doctor. When he glanced at my leg he stated that it was a hematoma. When I asked him what a hematoma was, he explained to me that as a result of my fall, I had broken blood vessels in my leg. Also, on further examination, he stated that I had nerve injury to the leg. Do I have legal grounds to sue the ER doctor/hospital since he failed on not 1 but 2 different visits to properly diagnose the injury to my leg?

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