I have no doubt that in the past you were warned that drugs (including alcohol) are toxic and could cause damage to your body. It seems that you are now aware that this warning was serious.
Before you start scanning the web for illnesses that compare with your inner feelings, just consider that you are most probably suffering from withdrawal symptoms.
Doctors know very little about the drugs that they so freely prescribe. It therefore follows that they will know nothing at all about the drugs that abusers use, including the quantities taken.
Never mind seeking medicines that will help your state of health for you cannot treat poison damage with yet more poisons. Never mind taking supplements that you THINK you may be short of. Blood tests will show if you NEED any supplements.
In a withdrawal situation, YOU are the only one who can do anything. Eat a good balanced diet, get exercise, and STAY AWAY FROM DRUGS