Please help. im worried! ?

Hello, This past friday night, I threwup due to alcohol and some marijuana smoking. I know i made a mistake but im paying the consequences. Since saturday morning, ive had this feeling thats all in my head of sort of lack of concentration and dizziness and just out of it. I am curious as to what this is and if i can fix it. My ideas were dehydration or a hangover. But, ive had plenty of water and gatorade(electrolytes) since that saturday morning so ive basically ruled dehydration out. But for the hangover, i dont have a headache it all just dizziness and such. My only other idea would be nicotine withdrawal but im not a heavy smoker. I had about 5 cigarettes this last week and i have no idea whats wrong. Please help if you can. Thanks Drew