Thank you all for your advice. I'm actually at the doctors on Monday for all of you who do not believe me. I have a suspected slipped disc. I was admitted to a&e last Monday and put on morphine. So have now been put on tramadol, diazapam and naproxen. Due to the different dosages on each tablet, I got a bit confused and genuinely took the wrong dosage of paracetamol. But thank you to those who took the time out to reply.