My stomach hurts days after drinking?

I got relatively drunk Saturday night (4 days ago). I drank mostly margaritas (tequila) and beer. I woke up that night with diarrhea, rapid heartbeat, and nausea. The next day it was a little better, but still diarrhea and nausea. I've had these same symptoms for the past few days and it is getting slightly better each day, but definitely still going on. My stomach hurts the worst after I eat. Is this normal? Any recommendations? Thanks!