Does this happen to you

Recently I was playing a 6 deck game and for about 2 hours. I wasn't winning, wasn't losing, just hovering around the same spot. There wasn't one time where the count warranted a max bet. All of a sudden the TC stays above 4 for 6 out of the last 7 hands of a shoe. I had my max bet out for all 6 of the hands: 4 I lose, 1 I push, and only 1 I win. I lost 48 units in about 10 minutes, and the whole time the TC was the highest that I had ever consistently seen. I would get 19 she would get 20. I would get 18 the dealer gets 19. I get 20 she has 20.
Frustating!
Does this happen to people often?