Palpitations and slight shallow breathing after weekend of drinking

Everytime i drink, whether it’s only on Saturday or if its both Saturday and Sunday, the next day I will always have noticeable palpitations like my heart is pounding from doing basic shit, and i also get sort of shallow breathing or as if I have to put more effort into breathing. I also get a pain that comes and goes in my upper left back usually worse with exertion. Is this normal or should I lower my drinking / mention it to my GP?