A max dose in my opinion is 30 drops 3x per day but some oregano oils are stronger than others, and this might be too much for your liver. But I would not do this any time soon and try working your way up to something like this. The antifungals won’t cure you, they just kill yeast. The yeast will typically become resistant to it over time and eventually the oregano oil won’t cause much die-off.
What you need is a detox plan that is more developed than what you currently have. I recommend liver cleansing herbs, such as the ones mentioned in this post: