Hearing that you are disappointed yet not discouraged shows a heart that is trying to hold fast to hope. It is good that you acknowledged the Lord before you applied. That is the right way to walk, to bring everything before Him and invite Him into your decisions.
At the same time, acknowledging Him is not a way to make God do what we have asked. He is always the One who initiates and we are the ones who respond to His love and grace. There is no work we can offer that obligates Him to answer in the way we expect. When we try to use prayer or acknowledgment as a way to force our preferred outcome, we put ourselves back into trusting our own effort and wisdom rather than resting in Him. True peace comes when we recognize that we do not have it in ourselves, but God is at work in us both to desire His will and to do it, and we can rest in Him even while we feel disappointed and imperfect.
Disappointment can tempt us to lean on weak supports, like trusting in a particular result or in empty assurances. Scripture warns against trusting in a broken reed that cannot hold weight. Learning to know the Lord more deeply is what helps trust grow. Jesus invites us to learn of Him, and as we come to know His character, His uprightness and faithfulness, it becomes easier to trust Him even when an answer is no or not yet. He is not sleeping or unaware. He sees you, and His promise is to go before you and to be behind you, to lead and to guard.
This is a moment to persevere and not drift backward. The danger for any of us is to start well with the Lord and then pull back when things do not go as we hoped. Serving the true and living God is always for your good, even through disappointment. It shapes you and makes you more like Christ, while turning to other hopes only brings confusion and hurt. God delights to use ordinary, flawed and weak people who have a heart that is turned toward Him, and He looks for those He can work through to accomplish His purposes. Your life remains His house as you hold fast your confidence in Him to the end.
It is better to fall into the hands of God than into the hands of people or circumstances. He is merciful and gracious, and He does not count iniquity against those who are trusting in Jesus Christ, even when they stumble. The record God has given is that He has provided eternal life, and that life is in His Son. If you are trusting in Jesus for salvation, you can come to Him honestly with this disappointment and leave it with Him.
May the Lord give you peace as you rest in Him, increase your knowledge of Him so your trust deepens, and keep you pressing forward into His will rather than drawing back. May He show you His good purpose in this closed door and open the right one in His time, and may you continue to respond to His goodness with love and thankfulness for all He has already done for you in Christ.