Stuttering under pressure

Stuttering under pressure So by "pressure" I mean, for example when I'm working and there is a lot of stuff to do all at once, so I have to hurry from one place to the other, and probably my heart rate is higher than usual. At those times, I stutter 4x more. There is no reason to though, I am under pressure from stuff that has nothing to do with my speech, but still, I am stuttering much more. Anyone can relate to this? Any tips? I've been trying to do breathing exercises in those situations but it's not too helpful.