Does Taking An Overdose Of Dicloflex Cause Harm?

Hi im a 23 year old male, 6ft, 12 stone with a history of back problems due to work, i woke up thsi morning and my back was really bad so in the coruse of today i have taken between 6-9 dicloflex to ease the pain. im worried if i have overdone it to the stage of causing damage to myself.