…Gag yourself.
Go for a run. Go for a walk. Listen to music endlessly.
Do whatever you can to make sure you do not blurt yourself out at them.
At one point you will see them suffering, even if it is not because of you or what you said, and you would want to reverse everything you said.
…
That said, when you have calmed down and so have they, please have a communication like an adult. The intent is to come to a point where both parties win.
Life is too short anyway, but it is even shorter to use harsh words with your parents.
Just because they gave you trauma, does not mean you get to level up the karma.