SINGLE vs. MULTI-DECK STREAKS!

Not that I want to encourage progressionists in their madness, but I have lost 14 hands straight playing single deck, not changing tables until after the 12th loss. I was playing Perfect BASIC, 5 count, plus minus, and counting with around 90% plus efficientcy.

Any of you have memories on the multideck shoes or double deck of longer losing streaks; more than 14 times in a row?

How much greater are the odds of that kind of extreme on multi deck than single?

What is the mathematical formula to compute this or what webb site will give the formula?