One breast harder than other?

I’m 6wk, I know I have denser tissue because I got a mass checked in Dec that was told was just dense and I probably noticed it due to where I was in my cycle. I don’t have anything like a lump, just a harder area. Since getting pregnant my left breast has also developed harder areas but not as much as my right. I’ve read lumpy breasts are normal. I have a physical soon and my first OB appt in 3wks so I’ll bring it up then but I just wanted to check and get reassurance that this is normal I guess 🤷🏼‍♀️