One day all this pain will make sense to you.
Pain is an intense sensation of feeling, stereotypically seen as causing distress and uncomfortable, whether it be physical or emotional. The joy of being human allows for us all to experience pain, and overcoming pain is one of life's biggest challenges. A lot of people fear pain, but don't realize that through their pain they grow a tremendous amount mentally, emotionally and physically.
For example, in order for a body builder to make massive gains in size and in strength it is imperative that their bodies be pushed to the limit, leaving them in pain during and after exercise, to acquire the most out of each workout. It takes years for a body builder to turn professional but all their pain and hard work pays off in the end if they push their selves hard enough. This example is synonymous with pain in a lot of different aspects of our lives. Without hard work, dedication, and of course some pain, all gains will be minimal, it takes going through pain to see how far you have come later on in life.