hi there, i also suffer with this condition with my last three pregnancies (medical term pruitis of prenancy). There is nothing you can put on it that will stop it or cure it , better to keep more moisturised than to dry it up which the calamine seems to do . then that just makes you wanna scratch the hell out of it! which it will scar to, but they gradually fade, you are stuck with it for the duration and at the moment this hot weather , makes it worse ! i had this with both my boy and girl which did clear up within couple weeks of birth , good luck and wish you well x