Dehydration blackout?

Last night i drank pretty excessively... i got in a fight with my roomate and don't remember much.. i probably had 15+ drinks. In the morning i still felt out of it, but i went to get some food. Once i got there i couldnt even eat, all i did was buy a gatorade. But when i was in the diner (college campus) i all of a sudden had this terrible feeling... I just need to sit down because i felt like i was going to faint. As soon as i walked out of the door, my vision went black, and i couldnt see anything. I got to a bench and layed there and closed my eyes, i started hearing ringing in my ears, and only could hear muffles, i started sweating profusely, and by the time i came out of it which was about 2 or 3 mins, but felt forever. I was all wet...

Could this be from dehydration or something else?