No matter how much effort one can put in to avoid change and risk, we all feel pain Rafael. Some with broken nails, some with broken lives but to each individually it's meaningful, it's our own personal problems made up of the thoughts we entertain, the dreams we have, the experiences we lived and how we decided to encode them in our minds.
Pain then can have different impact on different people. Some choose succumb underneath it. They let themselves get crushed by the potency of pain and how hard it can bite, and as a result they retract. They shrink, they stop and go back to their comfortable lives not going anywhere near it again.
Others, understand that pain is an immense driving force that all the great people that lived before us used as fuel for the purpose of increasing their personal threshold, to grow and learn from everything that happens to them, good or bad because you can always take something with you from the experience. Show me a great man, and he'll probably have at least one great pain.
Pain produces things inside you, Rafael. Don't run from it. Pain is a necessary part of learning to be comfortable being uncomfortable. And from that pain you can build tolerance, resilience, endurance and the strength of character that comes with it. Marcus Aurelius said "Nothing is so conducive to greatness of mind as the ability to subject each element of our experience in life to methodical and truthful examination".
And yes, pain is uncomfortable. It's supposed to. It's hard because it prepares you for life, and is the ultimate measure of will: you either want something bad enough to endure the pain, or you be like everyone else and don't get it.
But beware that it can also break you if you don't develop the habit of overcoming and improving yourself. Pain can make you quit, can make you give up on your goals and dreams, can make you start making excuses to yourself and come up with great explanations on how you're not even sure if you'd be successful. But it can go deeper than that. In your darkest moments, remember there's new life that will come from it. The sun will begin to rise next, so you can't give up. You need to get back up and endure the pain.
See if for what it is, and understand how it shaped who you are and you'll master the pain and learn to use it to your advantage. Reflect on your pains, the many you'll have as we all do, and use it as the beautiful tool it can be to imprint meaning in your life, but let this reasoning itself cause no pain as only your own judgment can harm you.
"Accept humbly: let go easily."