Well you are reaching out here and that is good. I can't get you through the cravings but I can say they don't last. Can you distract yourself with something, anything? Get out and maybe take a walk or walk on a treadmill. Exercise can help. Do you belong to AA? Can you call someone? Do you have any support from anyone that you can call?
Do know that this intense craving will not last and you can get through it. Also maybe remember why you quit and the consequences of picking up again. Trying to help.