Members of the President's AIDS commission told government officials they are doing a good job of fighting the disease, but suffer from a credibility gap and lack of coordination. The 13-member panel wound up two days of hearings devoted largely to briefings from federal health officials on what they are doing about AIDS. "You (U.S. officials) are doing a lot, but no one knows it," said panelist John J. Creedon, president of Metropolitan Life Insurance Co. But panelist Lawrence B. Walsh of Project HOPE said: "If everyone is doing what they say they're doing I don't understand why anyone is sick. What seems to be lacking is a national strategy."