No one here can tell you if you are an alcoholic or not NewPage, but you certainly have some of the red flags that signify a problem with drinking. I was similar to you in that I was a very "enthusiastic" social drinker but in the last couple years I started drinking way more at home and was having the start of some physical issues as well related to the drinking.
As far as what to do next, you need to decide if you think alcohol is a problem for you or not. That's the first and most important step. If you decide that it is, then you need to quit. SR is a great place to find info and support for both, so read a lot and ask lots of questions. Your life may depend on it!