33yr old healthy male; suddenly has delusions, anxiety, short temperament, unsightly body odor, memory loss. Could probiotics supplements cause this?

NO! I can't imagine any way that probiotics could cause these symptoms.We all have about 100 trillion bacteria in our intestines- adding a few billion friendly bacteria to this has minimal effect;it might help eliminate unfriendly microbes, which is only beneficial. There are many potential causes of your problems-nutrient deficiencies, toxic exposures, food allergies, infections, thyroid- see a good doc!