When you get your license in California, you agree to an implied consent that you will participate in a chemical test if requested lawfully by a police officer. If you refuse to give your blood or give a breath sample when asked, you can lose your license for a year. Additionally, you can be prosecuted for a DUI refusal. The penalties are greater than they are for a straight DUI.
It is not uncommon for the deputies to call the nurse to the jail and your consent is no longer necessary. They will end up with your refusal, and your blood results and you'll be punished. If this has happened call a lawyer, find out what's going to happen.
Is it going to make it worse?