I need help, have been drinking way too much.....?

I am 32 years old, and started drinking when I was 15. Until I was 28 I was able to drink in normal gatherings and usually go to sleep at the end, around 5am. Since 4 years ago, it has been happening more and more that I cannot control my drinking. I have been drinking once a week now, and I usually start at 9, 10 pm and go until the next day around 4pm, 6pm!!!! This is crazy!!!! I know that I am under the influence of alcohol but I can function normally, I go to the supermarket, bank etc.... and I act normally. I feel like I can open up more when I drink, and less shy and very talkative and communicative. I smoke a lot too in those binges. After I wake up I feel terrible withdraw symptoms, paranoia etc.... I then don't smoke or drink for a week and then I do it again. When I am not drinking I might smoke a cigarette a day only. I don't know what to do, I don't know how I can drink so much and still function since most people just p out. I ask God to help me all the time. I keep thinking that it's because I have been unemployed for almost a year and feel hopeless etc.... I really want to seek help, a psychologist or a alcohol counselor. I look at pics of myself when I was little and I think what happened to this sweet girl? I am not going to do this to her! I can't! I swear to myself I won't drink again and just like clockwork at the 1 week mark an overwhelming desire, craving takes over and I start and won't stop until I drank like 2 1.5 liter bottles of wine or like 2 12 packs of beer. Any insights please?