The contract is only 1NT. I can come to 7 tricks with 2 spades, 1 heart, 1 diamond, 2 clubs and a possible extra trick either in hearts (if west has the Ace) or diamonds (by leading twice towards my hand). The problem was that the 7 of hearts looked high and so, I thought it was East who had the heart length. So, I ducked a heart. Bad assumption. Then, when I was in dummy with a heart, I decided to use that single entry to lead a diamond. Second bad move. I needed to breach clubs, full of holes as they are.
The whole hand: