I think it comes down to the supplements you are taking and your diet. Please list your diet if possible.
The antifungal product you are using is not recommended; oregon grape is a berberine which destroys both the beneficial and bad bacteria in the gut like an antibiotic. Golden seal and Pau d’arco are both weak antifungals. I would try out SF722 undecenoic acid by thorne and black walnut/chamae rose extract as an alternative. Garlic is also one I use regularly.
You don’t need the grapefruit seed extract if you are taking a seperate antifungal product, antifungals won’t cure the infestation.
If you want to end flatulence, I would check out trying HCL (hydro-chloric acid). You are likely deficient in HCL which kills pathogens, bacteria, and candida in the gut.
Check out this post:
If you are deficient in HCL, food is fermenting in the gut and thus the flatulence.
Do you have other symptoms?
I would examine other digestive enzymes as well. I take one called pro-gest which I think is the best on the market.
Milk thistle protects and heals the liver and has nothing to do with candida. It is very important because the die-off damages your liver and kidneys which you want to prevent.