Dropped at 31 weeks with No.2 :-/

Grace
Hi ladies,
So I'm 31+2 with my 2nd and the last 2 days I feel like I've got a bowling ball between my legs and my bump has completely dropped! 
After doing lots of googling, it would seem as though it's not normal for baby no.2 onwards to dropped or engage this early as it normally happens just before or during labour apparently.
Has anybody ever dropped or had baby no.2 engage this early and still go on to have baby at full term? 
Xx