My husband has anxiety disorder, back problems, a groin injury. Who do I get him to see first?

I think these issues may be linked to a neck injury when he was a teenager but we haven't gotten any answers. The groin injury is epididymitis, Which our doctor said normally doesn't come back. But he has been dealing with this for almost 6 years, without relief? Who does he need to see first? A urologist, a psychiatrist, or a chiropractor? Does anyone else have any experience with these issues? I'm open to anything that can help because the pain seems to make his anxiety worse and is stressing us. Thanks.