Flat Head 2 Months

Has anyone had experience with baby’s head being flat on one side? Did it correct itself?

The way that she sleeps has caused one side of her head to be more flat than the other, and moving her during sleep only causes her to move back to her original position on that side. She won’t sleep on the other side.

We do tummy time, we carry her on the opposite side, but I don’t see any changes.

Will this go away?