We had a hand today that I did not know how to bid. East opened 1NT As South, I held 5 Hearts (AKQ), a total of 14 HCP, no other biddable suit. My partner took my 2 Heart bid as a preempt and passed. Was he correct? If so, how do you indicate an opening hand and suit preference after opponent's 1 NT? We should have been in 4 Hearts.