Hi

You are doing well so far. Congratulations on the weight loss.

The headaches often occur as a result of carb withdrawal. They should go in a day or two. It is just your body adjusting. A bit like going cold turkey.

How long can you stay on induction. That is up to you. Several people stay on it for a long time, whilst others find they loose weight better at a slightly higher carb level, 20 - 30 carbs. Only you can find this out through trial and error.

Every success for the future.