[Dynsei]

For thyroid, you need iodine. It's sources are iodized salt and seafood, even seaweed. There might be another source that's a plant source of it, but I'm unsure of that. There used to be a problem where people who lived far from the sea had large thyroids, because their thyroids were compensating for the lack of iodine in their diet. In the U.S. they've added iodine to salt to compensate for that.

For constipation problems, fruits should help, with issues that aren't directly related to menstruation. Still, fruits will help or relieve that issue.

Eating healthy fats, such as unrefined olive oil or nuts/seeds, will help your body too, because they are needed to transport and build hormones.

I agree with the suggestions above to see a doctor. What you've described could be symptoms of a larger problem, and it is probably made worse by deficiencies in nutrition. The doctor doesn't need to know you're trying NBE, but all they need to know is if what you're doing is safe. They need to help you diagnose any underlying problems.

I hope your condition gets better.