This same thing is happening to me and I can't figure it out! I was a bartender for a long time and drank regularly, woke up a little fuzzy the next day but no biggie. Now when I just have a couple cocktails I'm in really bad shape the next day! All day nausea and/or vomiting, runny eyes, shakes, etc. If you find out what's going on, I'd love to know.

One possible answer is that your body has possibly has became allergic to alcohol. But I'm not sure I've never heard of that before but its possible probably.
Another possible answer is that is that you're not taking good care of yourself while drinking. Drinking can reck havoc on the body. Causing symptoms ranging from terrible vomitting, headaches, etc etc and ending in death. Its possible that while drinking alcohol your body is becoming dehydrated or is lossing too many nutrients which thusly makes you sicker.
Now for a third possible answer is that its become a conditioned response to the alcohol. I would expect this for you 2ogera being a bartender and seeing all the other people drinking and seeing how they act and all. Its possible that you may have had a bad experience in combination with a bad hangover and since then things have only gotten worse over time.
So thats my three theories I hope they might help you.

I am having the same exact problem!! I started lightly in March with random nausea, now it's fierce the day after I have 2-4 drinks. I always eat while I'm drinking and drink water intermittantly. THis is terrible and I think I'll have to stick with club soda from here on out. I'm 33 and wondered if it had something to do with age?

I'm experiencing the same thing and would be very interested if anyone figures it out. I used to be able to drink normally and only have mild, normal hangover headaches the next day, but now even after only two or three drinks I'm violently ill all of the following day. If I try to eat, I throw that up too. I've been on a diet lately and eating less, maybe that could be related? I'm 25 and drink enough water.

People who drink every day and then throw up can be putting themselves into very serious jeopardy. Your esophagus is constantly irritated by the gastric juices and can eventually rupture and start to bleed. That happened to my son and by the time we rushed him to emergency they could not stop the blood flow. An ER doctor told me he might not make it through the night. Praise God, he did pull through but that was one of the worst nights of my life. Please try to realize what you may be doing to yourselves and talk to your doctor's about this issue. It might save your lives.