Thank you for you reply SShcherbyna. It was S&G, 3 players left, stacks were evenly distributed if I recall correctly (so approx. 2000 each). Pot was 400 at flop, 800 at turn, 1600 at river, I had approx. 900 left by the river.
So no big mistake here, just part of variance ? (Yes, I think I would have gone all the way anyway, so maybe I could check the river instead.)