These sound like die-off symptoms. You need to protect your liver and kidneys to avoid further die off. Diflucan can damage the liver potentially (FYI).
Do you have chelated molybdenum?
If all else fails, you can reduce or stop the diflucan and you should feel better. For some people, cheating on the diet can reduce die-off…eating something such as a half an apple, rice, etc.
Sweating out the toxins via the skin is a great way to detox and should help with the symptoms.
If you experience a lot of anxiety, depression, stress, etc…there’s an herb called ashwaganda (mispell) that can help.
What kind of “reactions” do you get after taking these vitamins? What ingredients are in your vitamins? Do they contain maltodextrin?