Please help!

Heather • Mother of 2 living children. And mommy of an angel to 2 also.. very nervous soon to be mommy.
So for about a year now iv had this weird pain, the inside of my vagina will randomly start burning, I have no STD, no UTI and no yeast.. It's a very irritating pain and some days I'll be in tears crying from the pain.. I had surgery on my stomach cause I had a lot of abdominal pain with this burning and they found scar tissue everywhere.. They cleaned it up but the burning pain stayed.. It's so irritating and so annoying I just wanna be pain free.. I keep telling my Doctor and even gotten told to see a Gyno and they still can't find anything...