My son learned to crawl, say mama, sit by himself and pull up to a stand all on the same week he turned 6 months old.. but now he's getting super curious and climbing to a stand on EVERYTHING (couch, chairs, my legs, toys, stool, table...you name it). He's practically unstoppable and carries himself well, but randomly stumbles and keeps bumping his head and face on our vinyl floor, carpeted floor and the sides of his crib.. He cries like it really hurt him, but not a minute later, he's at it again... Is this normal? Should I be worried about head trauma or something like that? He's 28 weeks old today.. Thank you.