You should contact a lawyer if you’ve been wrongfully laid off because you’re older, or a woman; if you’re a man who has been wrongfully accused of harassment; if you’ve been arrested; anytime your gut tells you, “This just isn’t right!”
Your problem may not always have a legal solution, but if it does your rights have an expiration date. It’s called a statute of limitations, and it exists in almost every type of case. So if you wait to long, no matter how wrong they were, or how right you are, you may not be able to do anything about it.