Sounds quite similar to my situation a couple of years ago. I certainly remember the few days without drinking and constant promises (sort of, not really) to really definitely limit my drinking to the weekends / the end of the week / ok not monday and tuesday. Don't panic. You may congratulate yourself for finding the honesty to recognize that there may be a problem. Creating this thread also was a good idea, it's important to "make it real" by communicating with others. There is no way of knowing exactly how your situation really is, if and how your body has adapted to regular consumption of alcohol or how strong your need to "protect the habit" is at this moment. But you are far from alone in self medicating depression and anxiety with a regular buzz.
Attending a support group probably seems like a huge step right now. The people there know exactly what that's like, they had a first time showing up, too. Personally, I decided to talk to a professional first and I recommend you do the same. I don't recommend just trying to stop drinking by yourself. Your body can react in rather weird ways to sudden changes in your drinking routine.