What can I do more ?

I got a wild Lemberger gambit yesterday evening. After the game - which I lost - I felt desperate : "What can I do more ?". The nicest girl can only give what she has - as the Flemish proverb goes. Well, the Blackmar Diemer complex has given me a lot, but sometimes it also takes...

1.d4 d5 2.e4 dxe4 3.Nc3 e5
The Lemberger countergambit. My opponent has read my book in detail and was convinced there was no black advantage in the main Blackmar Diemer lnes. So he prepared for this popular countergambit.

4.Nxe4
Other lines include 4.Qh5 and 4.Nge2

4...Qxd4
4...exd4 might be simpler for black

5.Bd3

5...Nc6 6.Nf3 Qd8 7.Qe2 Be7 8.Be3
Highly provocative - and black accepts the challenge

8...f5 9.000

9...fxe4 10.Bxe4 Bd7 11.Bxc6 bxc6 12.Nxe5 Bd6 13.Qh5+ g6 14.Nxg6 Nf6 15.Qh4 Rg8 16.Nf4 Rg4 17.Qh6 Bf8

White has no more options in this lost position as 18.Qh3 simply looses after 18...Rxf4 19.Rxd7 Qxd7 20.Qxd7+ Kxd7 21.Bxf4 Bd6 and black's piece proved to be stronger than my two pawns.

I felt really disappointed aftre this intense game - what can I do more ? Well maybe 13.Rhe1, with following lines :
- 13...Bxe5 14.Qh5+ Kf8 15.Bc5+ Bd6 16.Rxd6! cxd6 17.Bxd6+ Ne7 18.Qf3+ winning
- 13...Nf6 14.Qc4 winning instantly
- 13...Kf8 14.Qf3+ Nf6 15.Bc5 Be8 16.Qf4 with a tremendous attack.

So what could I have done  more - look beyond the obvious 13.Qh5+ and centralise rooks with 13.Rhe1 !