Help?

I've been having irritation in vagina area and weird light greenish discharge. Ive been swab tested and I came out negative for all sorts of tests. My first OB dr said it was a yeast infection and gave me medication for it (which hasn't worked) I switched, my new OB tested me and said everything came out negative on the test? And gave me something for the irritation (also cures yeast infection) but then told me the hormones can cause irritation in vagina area... okay? But what about the odd discharge and WHY SO ITCHY! It doesn't smell, but it does hurt when I have sexual intercourse, it won't sting or burn.. but it just feels extremely sore after intercourse and peeing afterwards. Wtf is going on??? Even on my blood tests I've had negative on sexual diseases so idk wtf is going on?!?! Has this happened to anyone?! I'm so close to giving birth and I honestly would be heart broken if I gave birth and had some kind of infection that went to my baby. Honestly I've desperately tried everything from plain yogurt to garlic to the medications I was given to treat this 😭😭😩😫 pleaseeeeee someone?!