I Only Drink Once Or Twice A YEAR (special Occasions).

I only drink once or twice a YEAR (special occasions). My class reunion was last nite and I drank 5 cocktails, which is more than I consume in a year, over a 3 hour period. Fast forward to 8am and Diarrhea has been with me most of the day today. My last bowel movement was black. Every time I go it chances color: first was type 3 then 4 and now type 6 on the Bristol stool chart. I'm drinking chicken broth and water and had a few chewable peto tabs. Should I be concerned?