Different people get experience different side effects. However, I know some people do experience a lot of increased anxiety to start with. I had the physical symptoms when I took them and these gradually lessened.
Right now I feel physically ill which in turn is increasing the paranoid and anxious thoughts.
This is what is increasing your anxiety. It is your thoughts that are causing the downward spiral into anxiety and panic. Try telling yourself that what you are experiencing is normal and is due to the medication.
If you doctor has prescribed Valium along with the Cipralex then I am sure it is fine to help you through this bad patch. Valium is addictive so not good for long term use though. If in any doubt I would advise you ring your doctor, or if you cannot wait until Monday you could try NHS Direct.