ok I am officially going crazy!!!!

So this may be tmi but I have a problem and it's actually driving me mental.
I'm 24 weeks pregnant and since the beginning  of pregnancy (and a tiny bit before) around the outside of my vulva is sooooooo ITCHYYY!!! It's really getting to me. When it's irritated (most of the time) it's all red and inflammed and has a wrinkly appearance...this is not my vagina!! 😓😢 I have been to the doctors and the first one told me its general irritation and didn't look like infection/thrush so wear cotton underwear and keep area dry. She also gave me a cream which didn't really do much.
Fast forward a few months and It's gotten worse. Last week one night in bed It was so bad I was in tears.. It eventually went away and I was able to sleep. So I went to doctors again and she did a swab and all bacteria levels came back normal and there was no trace of thrush...WHAT! I was hoping it would be something so it could be addressed and fixed! The doctor isn't very concerned as there is no smell and no discharge so she isn't worried about sti or yeast infection.  So she has said to try and do a vinegar in water wash and eat lots of yoghurt and even put yoghurt down there. The yogurt in a pad in my undies is the only thing keeping me sane right now. It's Instantly relieving but as soon as its absorbed ..it's back😩 I know it sounds so gross but desperate times call for desperate measures lol. 
Does anyone have experience with this? And what did you do? Is there anything else I could be doing except 
- wearing loose fitting pants 
-cotton underwear 
-non scented / organic body wAsh for sensitive areas
-not wearing underwear at night 
-eating yoghurt and applying it to down stairs 
-apple cider vinegar 
Please help me..I'm losing my mind!!!!