First few days on programme

[HOPE]

I started a new programme today, or should I say tried to start until I got a severe headache, early afternoon, it got so bad that I couldnt eat anything for rest of day, I know that it is a detox headache, has anyone else suffered the same on the first day and if so, what did you do to continue on, i'm so down about not being able to complete my first day. I would appreciate any feedback.