Sounds to me like your liver is getting tired! As your drinking increases your tolerance decreases as your body shuts down.
It is easier said than done to go to the doctor. I made an appointment specifically with a nurse practitioner so I could tell her about my depression and drinking and instead drank 3 beers before I saw her and walked out with a Welbutrin and Xanax prescription!
Don't drink and give an AA meeting or 2 or 90 a whirl!