Have those splints readjusted by your PT. More "zen" with pain? hmmmm whatever works.
It's very important when working through triggers or actual memories to stay grounded, as best as possible or often anyway. Telling yourself, your body and mind, that those things are not happening now and you don't need to be on alert, you don't need to fear, you don't need to tense up or get angry or any of that, will help limit the associated pains.
TC.