Answer:
Your will is your personal property during your lifetime.
If your will is kept by your lawyer, contact your lawyer's office. If someone else has your will, require that person to return your will to you forthwith. If such a person refuses to return your will to you, consult a lawyer.
It would probably be cheaper and faster to have a new will prepared than to engage in expensive litigation over your existing one.
In most cases, a new will states that all former wills are revoked.