Yes garlic....Tie a long string a round it like you are making it into a tampon. My midwife/nurse taught me this trick! I have PID right now from an untreated Bacterial Vaginosis infection. I took a bath last night in hot water with 2 cups of Apple Cider vinegar and took two capsules of Organic Oil of Oregano and could feel those two things fighting the bacteria in my pelvis region. I had terrible pain and was up almost all night. I am going to continue this regime until the pain stops. (FYI Been with only one man, my husband for the last 12 years and I had a baby 17 months ago and have been having boughts of BV and now PID since giving birth.) It's not necessarily from multiple sex partners or an STD/STI. You can just have your natural vaginal flora set off for many, many reasons. BV is very common and if left untreated will turn into a more serious infection such as PID. Hope this helps and God Bless!
Garlic and Oregano Oil
If you're female, take a largish clove of garlic, crush and split it somewhat lengthwise to form a cavity, drop 2 or 3 drops of oregano oil into it and push it inside the vagina to the back so it doesn't fall out. Be careful not to spill the oil. It will burn a bit, but the burn goes away in a few minutes. Leave it in for a day or two at a time.