OK, here goes:
If you had dropped your pawn, the board would look like this (your pieces in bold):
---G-
S-KS-
-G---
PPP-G
S-KS-
-G---
captured pieces (yours/mine): PP/P
Then I would have taken your pawn (in square 4d, not the one you dropped).
---G-
S-KS-
-G---
PSP-G
--KS-
-G---
captured pieces (yours/mine): PP/PP
I would expect you to (a) take my piece, (b) move another piece, or (c) move your gold general out of the way. If (a), I would have taken your gold general with my king. If (b), I would have taken your gold general. If (c), I would have continued with my S-2d move. In all three scenarios, I would accomplish my goal. Here is what the board would have looked like after each scenario:
(a (after two moves*)):
---G-
S-KS-
-----
PKP-G
---S-
-G---
captured pieces (yours/mine): PPS/PPG
(b (after two moves*)--for the sake of example, I moved the silver general on the right):
---G-
S-K--
-S-S-
P-P-G
--KS-
-G---
captured pieces (yours/mine): PP/PPG
Continuing with (b (for two more moves), and assuming you took my silver general with your silver, I would have dropped a pawn in front of it (4d):
---G-
--K--
-S-S-
PPP-G
--KS-
-G---
captured pieces (yours/mine): PPS/PG
(c (after two moves*)--assuming you moved your gold general straight backwards):
---G-
SGKS-
-----
PSPSG
--K--
-G---
captured pieces (yours/mine): PP/PP
Hopefully that all makes sense. I think that we should continue on with my alternate move (S-2d) now that you know what I was going to do, unless you don't think the outcome will be any different if I continue as originally planned.