For some background and the basic protocol, please visit http://www.oilpulling.com.
The standard protocol is OP 1x/day before eating, for 20 minutes, using 1T sesame or sunflower oil. I suggest you start with that and give it a couple of weeks, and then look at other oils, increasing frequency or duration, etc. EVCO (extra-virgin coconut oil) is an anti-fungal.
You might also post your symptoms over at the Humaworm forum, or look through the posts there, to see if a parasite cleanse might be in order. There are many around but I like Humaworm as he is so forthcoming with help for all!