What to do if i've been drinking a lot of alcohol over the past month. have i done serious damage to my kidneys/liver?

Alcohol ingestion: The kidneys merely excrete water and excessive alcohol (A) ingestion does not really affect them. The same cannot be said for your liver. Excessive A ingestion can damage your liver, as the liver metabolizes A. If your drinking was only for one month, not much damage should have been done, unless you have a long history of A ingestion previously. If you make dark urine, see a physician.