I finished a drink drive ban in 2015 resat my driving test and got my licence back but only for 12 month's until I had another medical, I went and had the blood and urine test's which were both fine but admitted taking drug's 6 months previous so they revoked my licence. 12 months later I went for the same tests and my CDT came back at 8.4%, I had calmed the drinking down so couldn't understand it. I went to my doctors who carried out a full blood investigation with no high results. I'm close to having the dvla tests again but don't want to fail them and don't understand why I had such a high result last time !!!!
Any help would be greatly appreciated