Congratulations and very well done you. I assume you are bidding in Acol where the points for a 1NT opening are 12-14? Maybe your bid paid off for this hand but in general your partner needs to have a true and accurate picture of your hand and your bid could be interpreted as misleading. With a headless spade suit, a singleton KH, a 3 card club suit to the QC and a six card diamond suit. The opening bid 1NT is not the most suitable bid in Acol or The Standard American Bidding System. If this was your system your partner would need to alert it as a a non-standard bid because you are not allowed to have secret (from the other players) bids.