get a new one immediately. till then keep on wearing the broken one if it is not loose. it should not hurt your tongue and cheeks 

Request your Orthodontist for emergency appointment. As new retainer is essential to avoid movement of teeth. Hope this helped.

Get new retainer

Get the new retainer made as soon as posible.

Don’t panic,discuss with your dental surgeon

Most probably your removable retainer must be broken. If so it will be repaired in very less time. If permanent then plz visit your dentist as soon as possible for you

Hi mam your removable or fixed upper retainer is broken? If Removable retainer is broken then visit any nearby dentist and get an impression done so that you can get the removable retainer within a day or two. Till then wear your broken retainer itself atleast during night. If Fixed retainer is broken in a single tooth or so you can visit your dentist and get it fixed immediately and later have a consultation with your orthodontist. Please don't delay waiting for your orthodontist as it is an emergency.

You can just make sure you get your new retainers as soon as possible .

Consulat yout orthodontist early as possible because retainer you have to wear after ortho treatment 

Better to Visit a local orthodontist and get a retainer.

Hello Get it replace as soon as possible.bcz it is like orthodontic emergency

Hi, Get in touch with your Orthodontist immediately and get the appointment. It is not advisable to stay without your retainer for long period of time.

Broken retainer can be considered as orthodontic emergency. If it not grossly deformed or mutilated , than is can be used for couple of days , your orthodontist will be best judge to suggest you in this regard.