is this normal?

I just got back from the dominican republic on tuesday april 2nd and have been feeling HORRIBLE since around night time march 31st. It was only a 5 day trip, but on day 4, was the WORST. I had to leave dinner early and lay down, I was so nauseous, light headed, and tbh scared as hell so my heart was beating so loudly i couldnt sleep! when i got home, i was still feeling EXHAUSTED, bags under my eyes, nauseous, headaches. I drank heavily the first 3 nights (fri-sun) like multiple drinks in my 30oz stanley throughout the day and 10+ shots each night. Not sure if this matters but i was also brushing my teeth with tap water which apparently is not recommended. Anyway its friday now so its been a week since the first night and my head is still sorta foggy and achey and im still so tired but ive been trying to sleep and stay hydrated because i got back to work soon and need to be able to stand up properly without getting light headed. Is this normal??? Im 19f if that matters