defense?
It could explain your bad driving, but it does not get you around the reason for the stop or whether you were in fact intoxicated. I suggest you speak with a lawyer and let him assess the whole situation as a DWI is not just one fact but a series of many. Most of us DWI lawyers offer a free in office consultation you would be wise to set one up ASAP, as the more time a lawyer has to work on the case the more that lawyer can do for you.