It is not possible to arrive at the conclusion based on the description that you have mentioned, but it is unlikely for alcohol to be a direct cause of your tongue swelling, although it can definitely be an aggravating factor..... the most possible explanation for your condition seems to be
vitamin deficiency..... nonetheless, the best option will be to go in for a proper clinical examination has a dentist's office so that the right diagnosis can be made and accordingly the right treatment can be instituted.....
Regards.....