"My main symptoms have been numbness/tingling, vision problems, fatigue and brain fog."

Those can be caused by candida, vitamin B12 deficiency, and magnesium deficiency. They also may be caused by parasites. The first thing to do is a one month parasite cleanse. Get a formula that has at least wormwood, black walnut green hull extract and cloves. a good inexpensive one is Kroeger Herb- Wormwood Combination. Two bottles are needed for a one month cleanse. Others like the Humaworm cleanse(available only at Humaworm.com).
I am in the process of doing a parasite cleanse now, as I had not done one in a while. Many here have seen parasites while doing a parasite cleanse, while others just felt better after a parasite cleanse(the herbs used are also very antifungal).


Some supplements that have helped me greatly are olive leaf extract, licorice root, magnesium malate, high dosage sublingual B12, as well as vitamin A 20,000 units a day, B vitamins 50 mg of each a day, 2 grams vitamin c a day, and calcium citrate.