I have the same, a little patch by my belly button which is so sore. It's painful everyday, I think it's just the stretching of the skin, I rub bump cream in daily and it eases it a little. X
I have it too! You're not alone
Its probably from the skin stretching and instead of itching its soar aain like a rugburn, try to put a thick layer of lotion on it.
I never had that but my friend was telling me about the same exact thing she said it felt like rug burn but there was nothing there and she asked her dr and the dr said she also had it with both her pregnancies but doesn't know what causes it.. sorry not much help but your not the only one lol good luck