Is it normal to get 'stress shift panic' when speaking Russian?

I record myself reading Russian news segments daily to check my intonation, but I noticed that when I'm stressed or speaking quickly, I completely forget the mobile stress rules for certain nouns. I end up pronouncing the word with an Americanized flat stress, and I can tell it sounds wrong to natives. Does anyone have a mnemonic system for tracking which words shift stress in the plural compared to the singular?