If the officer finds enough clues of impairment (and they will), there is probable cause to arrest you for driving under the influence. You will be taken to the police station and aske whether you wish to submit to a breathalyzer test to register your BAC. What the officer will never tell you is that the field sobriety tests, and BAC tests are voluntary and not required. You do not have to take these tests and in fact, you are providing evidence against yourself by submitting to these tests. There are consequences to not consenting to the tests including longer license suspensions but those can be reversed and undone in court with the help of a skilled DUI attorney by your side.