I have used garlic in pregnancy and did find some relief. It took longer than a week to see much improvement for me and it did not burn that much at all (compared to an herbal suppository I used before that, talk about pain!) It didn't work quite as well as I'd have liked. I wrapped it in gauze and used two cloves at a time, cut with a knife to release the juices more.
Externally, it helped with the unbearable itching/burning if I put coconut oil on the skin and the regular antifungal cream (OTC) was helpful, too, though I used it externally instead if internally. By using the two remedies mentioned below, I didn't need an OTC medication in the vaginal canal.
I have found tea tree oil suppositories very effective, you can find them in a health food store. I found that putting them in the freezer first to get the oil solid made it easier to put in the suppository. And, no, the burning did not bother me at all. It was mild, (like an analgesic) not painful, and felt good on the infection.
I combine that remedy with taking a special probiotic that delivers good bacteria (two strains) designed specifically for the vaginal tract to that area, called Femdophilus. You take it by mouth, but it travels in the body to the vaginal tract. It's more effective than douching or eating yogurt b/c they only contain bacteria for the small/large intestine people usually recommend (acidophilus). Increasing the right kind of bacteria in the vaginal tract helps to control the yeast growth and assist your body in balancing out the imbalance of too much yeast and too little of the right kind of bacteria.
I wish I'd known about that supplement sooner! I take two a day when in the midst of a full-on infection and one a day to keep them at bay. Some of my pregnancies I seem to be more susceptible to them than others and these things helped immensely.
Hope this helps and you find some relief soon, esp. since your baby is due so soon!
