((((((( Edda )))))))
I think that is something that happens to a lot of members at times. Remember that the best thing for you to do is your best self care. Maybe you need to step away from what has triggered you on PC and do some self searching and figuring out why it triggered you. Maybe then you can work through it to the point of being able to support someone.
If that doesn't work for you, maybe you can just send a hug or even the words, "I understand", if you can manage that. Those things can go far to a member who is struggling.
Please don't get down on yourself for going through this. It happens to us at times. No one can be everything to everybody. All you can do is the best you can do and I don't think anyone here would fault you for doing your self care.
Would it feel safer and less triggering for you to send a pm to a member to support them instead of posting publicly on the forum? I don't know if that would work for you, but it's definitely an option to think about and try.
Just know that we are all trying to do the best we can do.