Is your baby teething? When the baby's first teeth start appearing, it can cause painful, itching gums and general discomfort.
Crawling, walking, gripping, standing... there's no point trying to speed up a baby's development. Each child is unique, and even siblings differ from each other. If your baby is healthy, it will develop in its own time.
At this age, you can't leave the room without your child becoming anxious. It's time to start playing peekaboo.