If you reach out to a lawyer who does labor and employment law they will almost certainly agree to represent you on a contingent basis (I.e. they will not charge you hourly, but will take a percentage of whatever they recover for you). This is usually between 30-40 percent. This payment structure is allowed because it incentives the lawyer to get you as much as they possibly can - they do better when you do better.

Reaching out to the DOL as some people have already suggested isn’t a bad way to handle it, but having someone privately represent you will get you better and quicker results IMO.