Itchy 3 weeks PP

Whole pregnancy I’ve dealt with some rash starting on my belly and all over my body. Doctor said “I THINK it’s PUPPs rash” and prescribed me cetirizine until I gave birth. I would scratch like crazy til theres scabs all over me. My legs were the worst. 3 weeks since Ive given birth I’ve still been crazy itchy, with scars still all over me from the scabs, and still scratching as you can see fresh new wounds. What should I do… My legs were literally perfect before I got pregnant. And does anyone know anything I can do to get rid of the scars?