Use lots of lotion and oil and try not to wear clothes that fit too tightly or feel itchy when you put them on.
Dont scratch them!! Scratching makes ur stretch marks worse cuz the skin is delicate from the tearing. Just pat gently or put moisturizer so it doesn't get dry. There's nothing u can do at this point to make them go away except to not make its apeearance worse by scratching. All those bumps ur describing is the swelling from being scratched. That's all I can say. I have them too but I don't get itchy, that'll probably happen after baby pops out.