How Long Does Alcohol Stay In Our System Post Consumption?

I have not drunk alcohol for over a year due to recovery from alcohol problems.However, for the past week I have been drinking a single bottle of white wine a day, I have addressed this and have once again stopped. My question is that I have my DVLA medical in 4 weeks and I question if my recent relapse will prevent me from regaining my license? I do not smoke and I'm healthy in every other way, although I am on arthritis medication and have regular liver function tests which all come back normal.