DS is almost 5 months, and he often uses the back of his hand on the floor instead of using his palms. He therefore struggles to push himself up or roll and gets frustrated about not being able to move, but is putting his full weight with his hands flexed under him. If we place his palms flat on the floor then he can push but can’t seem to get into that position himself. Just wondered if anyone else found their babies did this or if I should be concerned