I feel for you, this is going to be tough but you have to just keep going. I have been doing rolling 88 hour snake juice fasting for the last couple of months. The results have been incredible, I have lost 53 pounds and counting.
But I am not going to lie to you, the first two or three weeks the hunger pangs, withdrawal the cravings were all killer. The great news is that once you have worked your way through the rough stuff, those all go away and it is much smoother sailing from there.
Your gut biome is changing as you stop eating. This will pass. Adjust to a more cleaner eating lifestyle in the future (such as carnivore / ketovore / paleo) and any kind of hunger pangs like this will be a thing of the past.