I'm so uncomfortable all the time.

At about 15 weeks I was diagnosed with BV. I took the medicine and was fine a week later.

I have battled yeast infections on and off since having my first baby so I thought.

However I went to the doctor two weeks ago and told him I thought I might have a yeast infection due to the burning and itching I've been experiencing and told him how I have dealt with it on and off for a while now. They did a swab test and It came back negative for any infections. I have no clue what is causing the burning and itch. Especially after sex. Which has really put a damper on mine and my husband's sex life. Does anyone have any clue what Could be wrong. I have no abnormal discharge. My doctor seems to think I'm fine. I am miserable though. Is this a normal pregnancy thing? I do have very sensitive skin but I use all natural soaps and laundry detergent. Another thing is I'm still nursing my oldest child and I'm wondering if it could be a hormonal imbalance causing the problem.