I Use To Drink Quite Regularly, And Probably More Than

I use to drink quite regularly, and probably more than I should have. Never effected me. Recently I have stopped drinking with the exception of a beer here and there when at a social event or having dinner with friends and family. I have been getting fly like symptoms a few hours after I have consumed 1 or beverages. Seems to be once I have stopped consuming the couple of drinks. What is the reason? And should I go to a dr?