It's worth it to at least consult one. You can often get affordable or free initial consults that will get you an idea of what you are up against, odds and how much it might cost. It might be a situations where it won't take many billable hours. Sometimes a lawyer chiming in on an email thread is all it takes to completely change the conversation.

I've yet to be in a situation where I've thought "Maybe I should talk to a lawyer" and I did and regretted it.