Doesn't matter what I take or eat or don't eat before an interview, this happens to me every time. Not when I wake up, not when I'm showering or getting dressed

Doesn't matter what I take or eat or don't eat before an interview, this happens to me every time. Not when I wake up, not when I'm showering or getting dressed, but right before I have to walk out the door. I'm amazed that I've ever even landed a job.