Not sure whether I have a problem or not

Hi everyone,
I'm a 22 year old girl diagnosed with borderline personality disorder. I'm here because I would like to know your opinions on whether you think I do have a drinking problem or I am just making a big deal out of it.
I've been drinking ever since I was 16. In the last 3-4 years it became a habit. I don't drink every day, I mostly drink whenever I get the chance and I'm not at home (I still live with my family)... on average, I drink weekly. Trouble is, when I do drink, I drink a lot. I've been having black outs, I always throw up, and I ended up in the ER once for abusing alcohol. This semester I had this habit of getting a 500ml high percentage beer on every Thursday before class on an empty stomach. Moreover I've been told I shouldn't drink because I take several medications for my mental illness.
My tolerance has decreased lately for some reason. I used to handle a lot more than I do now - but I'm not sure if this is just my impression. My hangovers last two days - and I used to never get hangovers. I can see it has been impacting my mental health, as depression, anxiety and dissociation (which are common borderline symptoms) always amplify the days following a binge drinking episode.
I don't drink for fun, but to escape real life and my emotions and maybe to sound funnier to my friends...
I always read that alcoholics are those who drink a large amount every day and I can't relate to that. So I was wondering... should I get help? Am I serious enough? Should I cut on my drinking at all?

First of all, I want to commend you for wanting to take a closer look at it and questioning your own alcohol use.
I can't say whether you have a problem or not. That would have to be between you and a professional, or at least your own decision.
I know that once I got to the point of questioning my own drinking habits, I was pretty sure that I had a problem. Family and friends around me also thought that I should back off the drinking.
I liked to think of myself as a heavy drinker, but not as an alcoholic. I didn't have to drink everyday, but towards the end, I did drink everyday. I couldn't imagine life without alcohol. It became my best friend and after it turned against me, I found out how difficult it was to stop.
A 'binge' drinking pattern or never knowing when to stop (sometimes the only time I stopped was when I passed out), not remembering where I went or how I got home, puking and peeing myself and not being invited to parties anymore were some of my warning signs.
I could not predict what would happen once I started drinking. I could not stop once I got started.
I was able to quit drinking finally when I was 30 years old after 3 rehabs. I gave up smoking at the same time because I did them both together anyways.
Alcohol can counter-act the benefits of other medications. It can affect learning, nutrition and the digestive system. It is a central nervous system depressant and can be addictive. It can cause cellular damage and brain atrophy (absorbs water), this is why we get so thirsty the next day. It can cause certain cancers.
I joined AA and became friends with people who were trying to do the same thing I was. We worked together and helped each other get sober and stay sober.
The first step of the 12 steps of AA is simple: "We admitted that we were powerless over alcohol and that our lives had become unmanageable". That's pretty much where I was at when I came into the rooms.
Alcohol had beaten me down and had turned me into someone that I didn't want to be. It took me places that I didn't want to go. My life had become unmanageable. I had little choice but to try recovery, one day at a time.
Recovery isn't a perfect world, but at least it is 'real'. I trust my decisions today. I have a driver's license and the respect of family and friends again. I still make mistakes sometimes, but they aren't as stupid as they used to be. I honestly don't think that I would be alive today if I had kept drinking.
Best of luck to you.

I think you should look at it this way : Instead of asking " Do I have a drinking problem ? " you should ask yourself " Is my drinking causing me problems ? " . From what you've written , you seem to believe it is and I agree with that .

My ex drank the same way . He didn't drink every day , in fact - he only drank on the weekends . But as soon as he had the first one , he didn't stop until he was unconscious or there was no more alcohol available . Usually the two went hand-in-hand .

The bottom line is , he drank to feel good and always ended up feeling terrible . He drank to forget his problems and ended up with way more problems caused by his drinking . Alcohol did nothing good for him . He's sober now , and very , very glad he is .

You don't have to declare yourself an alcoholic before you take steps to stop drinking . You can do it just because you decide it's not a good or healthy thing for you .