My LO is 7 months old and his soft spots are closing up nicely. However this morning I was rubbing his head and it is now bigger than it was probably a month or so ago. Not by much, but it is bigger. Is this normal? Can they vary in size until they close up? As far as I know he hasn’t hit it on anything. Minor bumps to the head as he’s learning to crawl, but nothing to the top of his head where the spot is. I’m just a little freaked out..