Water fast 13 days, how long before I'm good to go again?

I’ve just finished a 13 day water fast my goal was 14 days but I broke early as yesterday was not great and I no longer felt comfortsble fasting.

Stats F 45 5ft 4” 173lbs>151lbs so a loss of 22lbs.

Overall I enjoyed the experience days 4-7 were horrendous for pain, migraine and the joint pain I would usually get was exacerbated but day 8 brought a very funny eurphoria. Yep, the giggles…

I continued to cook and bake for those I love but I just didn’t have the energy or will to go to the gym as usual. I have ME/CFS anyway so I am used to being lethargic, it felt the same really, good days, bad days nothing different from normal. Except there was one thing I did notice I took much less medication for pain especially days 8~11.

It was my first fast and I am quite proud of myself and the discipline I found I had but I do believe everyone can do it. It’s all about listening to your own mind and body.

I broke my fast with scrambled eggs then soup x 2 a few hours in between. So far so good.

I would like to do another fast in the near future. My question is what is the best advice for such if my nutrition from now was very good? I was intending on staying in keto or very close allowing for normal life.

Any help appreciated.