So itchy!

Since pretty much conception, I've been itchy. We can't figure out what causes it for sure and never happened before pregnancy. It can be maddening at times. I've changed soaps, I've moisturized, I've tried cold compresses, etc etc etc. The only thing that seems to help is Benedryl but it just knocks me out so I don't notice. If I fight through falling asleep, I tend to still be itchy. It can be from not there to painfully itchy in minutes. My doctor says all my blood tests are normal and that I should just take a Benedryl. I feel like she didn't take my concern very seriously at the time. I'd also rather not take medication every single day. Has anyone else experienced this? Does anyone have any other remedies not involving medicine?