I had a similar, but smaller experience. I looked at the clock and i went downstairs, when i reached the bottom of the stairs, i looked at the clock
and it read 10 minutes later. I went back upstairs and realized 15 minutes had passed in the time i had walked up and down the stairs.
In the Michael Chriton book, Andromeda Strain, a character had something similar to that happen to him where he would tie his shoe and look up and ten
minutes had passed. It turned out he had epilepsy, dunno if its worth looking into, but maybe worthwhile.