"I am starting school the 27th (I'm 23) and debating whether it's wise to continue the fast through the start of school. Advice there from someone who's been there, done that would be appreciated."
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I think you will need to listen to your own body and decide for yourself. Every fast is different so I cannot see how anyone can advise you. You may find yourself in a state of mental clarity which in that case you may want to continue. You may find yourself in a deep healing crisis in which you may not be able to continue. You may just feel a little tired or a little weak and wish to except this as a challenge to continue. Your body will advise you if you will just listen to it. I'll let someone else answer the other questions.