What you experience is not true hunger. You have to stay focused, these opportunities of fasting and making it to 8 days dies not come often.
Drink warm water as per thirst, everytime you feel hungry drink warm water like drinking tea, slowly in small amounts.
Are you brushing your teeth with toothpaste? If yes, please stop. Don't put anything in your mouth but water.
Just imagine it took you so many years to get this way, toxic with unhealthy weight. It will take a long time to get healed. So continue andimagine you being thin again.
Also hopefully post fast you will be on plant based diet, which will continue your detox and healing.