Do not let me pick up the blocks that I destroyed with my hand or with a beak

On 12/31/2016 play a creative minecraft all day correctly
The next day I was playing in creative mode and when I fell in the lava, I was not burning, but I did not die. Press the esc key. And I came back to the game and here was when with the hand or with the beak that I found in a chest I broke the block but did not remain floating to pick it up so I can only destroy blocks nothing else I can not go over and pick it up and get it Add my inventory to the blocks that I am getting, whether they are from stone sand etc. please help me. Thank you