How long has your tank been set up? If it's not fully cycled that could be stressing them. Do you know what your Ammonia, nitrites, and nitrates are?
And like emmanuelchavez said, it takes awhile for a fish to adjust even if your tank is fully cycled. I think your choice of fish is fine. I've never had pearl or honey gouramis so someone may want to add if those 2 are compatible or not. As long as there is no aggression they should be fine. Really, give it more time. I know how easy it is to do but Quit Stressing!
