30wks. Is this too early for baby to have dropped?

Katie
He was head down at our appointment on Monday but over the course of yesterday and today he has burrowed down further, I can feel it in my pelvis. Now the top of the bump the whole area above my belly button where I used to be able to feel him is deflated and he's definitely sitting lower. First pregnancy here- when does that normally happen? Is this too early???!!!