There are two types of withdrawal from nicotine. There is physical withdrawal and there is emotional withdrawal. For the physical withdrawal there are nicotine replacement therapies which have nicotine in them and will help you withdraw slowly physically. Nicotine addiction is 80 percent psychological, it's 20 percent physical. Either way it can be a very difficult withdrawal.
One of the first suggestions I have is to treat yourself like a little kid, like a child. Get plenty of rest. Eat proper nutritious meals. Nap when you're tired if you can. Take walks around the block. Or, if you live near a body of water or in the mountains, take a beautiful walk and look at the sky.
Deep breathe. Breathe in and out. Drink a lot of water. That will also help you with cravings. And the deep breathing will help you when you're feeling panicky and full of anxiety. It's the first thing a paramedic will tell you when you're feeling terrified. When you see a tragic accident a paramedic would tell you, take deep breaths slowly in through your nose and out through your mouth. Well, it works the same way with the nicotine withdrawal.
There are many things that you can do to also help you with nicotine withdrawal. Don't let yourself get too lonely. I've already mentioned tired. If you're angry try to deep breathe. Try to talk it out with a friend whatever's going on, because these things can be exacerbated by the withdrawal. You could end up picking up a cigarette instead of dealing with the actual situation.
I recommend you try all of these things. Please, reward yourself. Be good to yourself. Don't pick up a cigarette.