Its so itchy .. what rash is this? :(

Hi all. Attached pics of my ugly preg 21 wks tummy.having very bad rash for my 2nd pregnancy. Went to doc n they say its hormonal n preg rash... anybody got this before? How do i prevent it from spreading? Even if i dont scratch.. the marks will just be there... not sure if this is permanent. 😫 its so bad till i find it hard to function on a normal basis. Taking antihistamine, using aloe vera, shea butter... what else can i do mummies? Help needed🥺