you poor thing. In reality, a couple of extra panadol today is not likely to cause any long term effect to you or your unborn child. It is however, not recommended. If your back is causing you that much pain, panadol is not likely to be the solution you need. I would suggest an after hours doc or even a trip to Emergency so you can get something for the pain for now and also some appropriate advice on long term management for the remainder of your pregnancy... you don't want to have to go through this longer than you need to - I've had bad back pain and it is AWFUL!

MG