Should Have Known Better

By 23, there are things I should know better, especially when it comes to my body. I should know how it works and how it reacts to certain things, I shouldn't end up spending the night in the hospital because of something I should know better.
Here's how it went down.
Friday morning, I get a text from one of my BFFs, asking if I wanted to go for drinks. She's had a tough week, and she also wanted to check in with me, because last weekend I found out that one of my clients passed away. So out we went, it was a beautiful Friday night and we found a pub on Bloor St. where the front windows opened garage-door style. We got a table right near the street, so we drank and ate and talked and people-watched for hours until the guy she is seeing showed up. At that point, I was already tipsy. I don't drink too much and I am on medication that lowers my alcohol tolerance, so I have a really low tolerance. So, when the boy showed up, I was already tipsy, and he then proceeded to order us drinks and shots. We made friends with the couple at the table next to us, and generally had a really good time. I usually keep myself sober enough to take transit home, because I live an hour's ride by transit away from downtown. That night, I knew that taking transit by myself would be a bad idea. I have never been that drunk before in my life. I texted friends on the way home to keep myself from passing out. I finally made it home, puked a few times, took a gravol and stumbled into my bed.
Now, I should explain why this is an extra bad idea for me. We believe that I have what's called Cyclic Vomiting Syndrome. I've had this since I was a young teen, the first time I remember it happening was in grade 10. Often it comes when I am nervous or stressed out, it has happened before when I've eaten foods that disagree with me as well. It's never happened before because of drinking, mostly because I usually keep myself in check. Basically, what happens is that I start throwing up, usually early morning, and I keep throwing up, for hours and hours, even when there isn't anything left in my stomach to throw up. It turns into dry heaving and I heave and heave for hours upon hours. Once before, I had to go to the hospital, but usually my Grandpa (a doctor) orders me a perscription of injectable gravol that Mom (a former nurse) gives to me. After an injection or two of gravol, I usually calm down and am able to stop puking, but it can take me days to really recover, because it wears me out. It hasn't happened now for almost 2 years, and it has never happened when I am so far away from home.
I woke up at 8:00 on Saturday morning and the vomiting started. Luckily, I have a cousin who lives in the same city and has helped me deal with the vomiting before, and she was able to come over and help nurse me. I don't think I could have made it through this on my own. By 6 at night, I was still vomiting and not able to keep anything inside of me, so we decided I had to go to the hospital. After what seemed like forever, I was admitted and given fluids and 3 bags of anti-nauseants before I settled down. By 5am, I was feeling better and able to keep fluids down, so my cousin took me home.
We slept all day today, with me waking up to call in to work and every once in a while drink some ginger ale and eat some crackers. My cousin went home late afternoon, and since then I've been home alone, nursing fluids and trying to make myself eat regularly.
Usually I love living by myself, but when I get sick, I hate it. I get so terribly home sick. I hate having to bother friends to come over to help me, but at the same time, I can hardly take care of myself.
But, I should have known better. I need to remember that I am not invincible and that I cannot possibly drink that much, especially when I live by myself and have no one to take care of me.
I am feeling better now, but I not only missed an incredibly beautiful weekend, I missed 2 days of work so far, and I had to cancel my interview for full-time at the shelter. Stupid, stupid, stupid.