The left side of my hip, butt, leg is painful. Sciatic nerve is what friends are saying. Do I see a chiropractor or neurologist? Is this dangerous?

Either. See someone, including your pcp. They all should be able to help diagnose and treat this.
Not dangerous unless. sudden and severe. There are several causes of sciatic distribution pain, and it is so common in people that a specialist is not needed unless certain danger signs are found. Then it would be a neurosurgeon needed.