Mediation is voluntary. No one can force you to mediate. If you feel at any time during the mediation that you are not comfortable or that you want to stop, tell the mediator.
The mediator will not stop you from leaving the mediation, but they will listen to what is worrying or upsetting you. If they can, they will come up with a solution. Please give the mediator a chance to help you before you leave the mediation.