I know that you aren't supposed to take Nurofen because of possible foetal deformities and possible placenta bleeding but at this early stage I wouldn't worry - if you are pregnant you would have only been at the cell division stage. I did google it once and from memory it is most dangerous in the third trimester.

Codeine is safe during pregnancy so if you are in a lot of pain and paracetamol isn't working for you Panadeine is fine. Codeine can cause constipation though so make sure you keep your fluids up.

Codral - don't know the reasons behind that one, a quick google would answer that.