Depends on partnership agreements following reverse to 2H. Is 2S forcing? if not are you using Ingberman 2nt for a weak sign off hand? 3S is forcing but denies a diamond stopper with extra spades.suggest using ingbeman 2nt. Without consideration of background agreements, I would bid ant--it shows stops in the diamonds and spades with the values for ant and enough transportation between the hands to not make shortness in diamonds a real problem. There may be wasted values in both hands so 4S needs to be considered over anuy rebid.