When people cease alcohol consumption they will experience emotional distress; interrupting any habit e.g., drinking wine, running, having a diet coke every afternoon, causes this; but with alcohol, people experience physical distress because their body has adapted to the alcohol. They become agitated, can't sleep. Withdrawal symptoms is what you would be experiencing if you stopped drinking all alcohol for several days. This would be a sign of alcoholism. If you were merely emotionally upset a bit, because drinking alcohol helped you calm down or feel a bit better, and this source of 'calming' was removed from your life, this would be more along the lines of psychological withdrawal.
So the question is, if you know that you are at risk for developing alcoholism and you don't get physically ill when you stop drinking, then you could probably easily adapt to cutting back on your alcohol consumption. You could do this by premeasuring how much you will drink today, an then making sure you drink it extra-slowly, making the drink last longer than usual, even though you have poured out fewer ounces.
Alcohol contains lots of calories so you might find that when you cut back, you will lose weight, which might be a good thing. Also, drinking alcohol tends to disrupt the normal sleep cycles of people. Withdrawal symptoms will cause some fairly significant or dramatic withdrawal symptoms if the person is addicted and has developed a high level of tolerance to alcohol. In your case however, the problems sleeping during the last few weeks could easily be caused by the stress
and worries you experience, especially if you have trouble falling asleep; and, when you can't fall asleep, you have many thoughts or problems running through your mind.
I hope this information is helpful to you. Please let me know if I have overlooked any aspect of your original question. Please hit the green Accept button at the bottom of the screen. Thanks.