Absolutely Lisa.... I certainly do if the stress is seemingly too much. My preferred option is often to go have a lay down, maybe a sleep for an hour or two, then I am typically fine. Depending on the level of stress, sometimes I may not be capable to speak of an issue for days until I can lower my stress levels to deal with the problem, knowing it will create a requisite amount of stress just dealing with it.

If this is a recurring issue though, I would suggest you need to further push yourself and find a more appropriate boundary, ie. avoiding discussion and going silent is not always the best option for ourselves, or others. Some times we must talk about the problem to actually get better, to relieve the stress. I could actually say the the majority of times it is better to talk as it relieves the stress thus no requirement to be mute or silent for extended periods.

It does take an individual effort, it does take time, it does take constant learning and doing to maintain. Just part of learning how to manage PTSD. People at the best of times avoid emotional discussion, we must hit it head on and force ourselves more often than not to discuss so we can lower our stress levels. On the odd occasion though there are always circumstances where it is best to recluse for a rest, then hit the conversation in a discussion.