Head Shape

My little boy was born 8/8/18 and my husband and I are concerned about the shape of his head. Since birth he’s favoured one side of his head and for a short time cried if you moved his head in the opposite direction. Recently he’s began holding his weight on his arms but has not yet rolled from front to back or back to front.

Should we be worried?

Any other mums/dads with babies with flat heads?