I've just sent an answer about Threelac couple of rows below.
I think the fastest way to get rid of the problem is combining these things:
-take supplements that kill the yeast
-start a yeast-control diet
-try to reduce stress in your life
-drink lots of water to help your body flush out the toxins
-rest as much as possible
The closer you stick with these rules, the fastest results you'll see.
I'm not sure if you've ever tried the control diet or how healthy your lifestyle is: these changes may be extremely hard at the beginning and you will need tons of support - we are here if you are in need or doubt... :)
It will get easier when you'll see results, you'll feel more energetic, more alert, overall healthier, and after the Master-Cleanse you'll feel even better - hopefully really soon, right? :)