I've had this three times so far and I'm 27 weeks today! I went in and have been told it was bacterial vaginitis, which can happen from your ph being off...super annoying,.considering I was prescribed medication each time and this time it was the stuff you insert...get rid if it, but then medication caused a yeast infection.
I get that quite often and I think its something to do with extra discharge and ph balance. I use a special soap that I got from GUM clinic some time ago and its stops the itch.
Could be Thrush very common in pregnancy ive had it twice already and im 25weeks tomorrow