Both Vul at IMPS, playing with a sound bidder
2'nd seat
1H-P-2H(7-10ish in support)-3D
3H-P-P-3S
P-?
Well, on the plus side, I have a big double fit for partner, who likely has 4S and 6D (and might even have 5S). on the minus side, my points are in clubs, and I have no idea how many clubs partner has. Well after tanking for 3 minutes I elected to bid 4S (you know vul at imps and all that) hoping to get lucky opposite KQxx xx AKxxxx x (2-2 diamonds is about 40%) and maybe partner has a better hand. It goes all pass, and now you get to play it on the rusinow CQ lead.
Scoring: IMPS
What's the best line, given the bidding?

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