For thrush: I have tried literally everything, including 3 straight months of diflucan, homeopathics, and every natural treatment there is. A combo of Threelac internally and coconut oil on my nipple externally works EVERY TIME and lasts for longer than anything else has. I also have to limit my sugar, but I can get by with a candy bar every day. I could never have done that before. More than that and I'll start getting prickly nipples and/or other yeast symptoms. I'll take a packet of threelac and rub some coconut oil on my nipples maybe 2-3 times in a day, and resolve not to go overboard again the next day, and I'm fine for weeks or months! It's absolutely amazing.
FYI, I am nursing a 3 yr old and a 1 yr old and have struggled with thrush every single day since the birth of my first 10 years ago, until I started using threelac with coconut oil in the early summer. I also now eat TFs, which includes significant use of coconut oil internally, as well. However, I saw no real change until I started using external application of the coconut oil (works in the vaginal area, also, btw. Dh like to apply "my medication" with a "special wand", tee hee, meaning it's a good lubricant) and using the powerful probiotic. Culturelle, water kefir, and every other bottled probiotic I have used did not do a fraction of what threelac does for me against yeast.