Stretch marks itch

So of course I know to put creams and lotion on my stretch marks but it's getting to the point now where I have a rash and nothing is helping and when I scratch I feel very very nauseated. Please God I hope at my appt they offer to induce me soon I can't take much more. I have gd as well so I hope they realize they need to be keeping an eye on the size of the baby as well