my 8 month dd is normally a happy sunny little thing but a few weeks ago she seemed out of sorts, grizzling on and off all the time and looked very tired, yet fighting naps. After a week of this, her two bottom teeth came through and she began sitting up by herself and trying to crawl. She seemed almost overnight much happier. She's now going through the same thing of grizzling, looking really tired again - I can't see any teeth and she still isn't crawling, and now gets very cross and frustrated when she tries now.
Is this typical of growth spurts and teething?