Probiotics and Worse Symptoms

Hi all. I just started taking probiotics religiously everyday to help combat a long standing candida problem (11 years). I believe my problem is mercury poisoning from Amalgam fillings and I'm addressing that soon with my dentist. In the meantime, I drink pau darco tea every morning and take loads of probiotics later in the day. Suddenly I have increased symptoms of fatigue. It seems my small intestine has grown a lot more candida and the fatigue is major. In the past I've been able to manage the severity of my symptoms since I've had this problem so long, but for some reason suddenly the fatigue is so bad I had to leave work early today. I'm very worried.

The probiotic I've been taking is called Multidophilus 12. I always thought it was a very good potent product. So why are my symptoms worse? Very confused.