Hello, and welcome to the forum.
It definitely sounds like your nutritionist believes you have Candida.
Aquaflora Candida 9 is a homeopathic medicine, so if it works it will be very slow to take effect, which is the major problem with homeopathic medicines, especially with Candida which normally causes suffering to anyone with the infestation. Also, using this type of medicine will often cause the symptoms to worsen for a while. After all, as a homeopathic medicine it actually contains Candida Albicans.
Itching and hives are not normal symptoms of die-off, these sound more like the Candida symptoms than anything else. Something to look for; after a major die-off experience the person normally feels better than worse.
Although it doesn’t hurt, olive leaf extract isn’t one of the strongest antifungals against Candida. One way to see that is to compare the dosage. For example, an average olive leaf liquid extract container suggests 30 to 42 drops twice a day. Whereas the dosage for oil of oregano is 2 to 3 drops 3 times a day of the diluted extracts. As you can see, there’s a huge difference.
For what purpose are you taking the baking soda?
Look at the ingredients of the Ranitidine and see if it contains aspartame, which it often does, this is a sugar alcohol which will feed the Candida and keep it alive and thriving. It’s also dangerous to the general health of humans.
It would be interesting to see what the ingredients are in the women’s multivitamin you’re taking as well as the enzyme probiotic complex.
Quercetin is an antioxidant found naturally in onions and leeks; I see no problem with taking it.