No place/mining

 So... I was playing minecraft tryna make soem lavacasts near 0 , 0, then this happened.._ i wasnt able to place or mine blox. Idk how i did it so NO ASKING!!!!!!!!!f also i had a ultimately weak lag machine so i guess dats why :I but i even tried at 1milX 70Y 0Z and it didnt work anyway bt when i logged out and in again i could again yay.. And no pics..