If the appliance is broken, it needs to be repaired before treatment continues – a part that is important for moving the teeth may have broken off. So stop activating the appliance and contact your orthodontist. If you can't see your orthodontist straight away and the appliance doesn't sit properly in the mouth because of the break, at least try to sleep with it in until the problem can be sorted out.
This answer is for general information. Your own case needs an examination by an orthodontist.