Opponents may give you a chance to improve your bid

This hand, I played in 3S doubled down 1 for a bottom board.  The problem was the bidding. See it?

When I bid 1S, I'd prepared my second bid and decided that it was borderline between 2H and 3H.  So when west preempted diamonds, I decided to upgrade and bid 3H.  I was answering the wrong question. The 3D had opened up the opportunity to show 3 suits with a takeout double.  The opponents had given me a chance to improve my second bid, but I didn't take it.

Partner would have left the double in and decent defense would have 3D down at least 2. The full hand: