Yup, I feel that way too. I used to constantly ask myself, "why me?" "What did I do to deserve this?" I came to two conclusions. 1) What comes around goes around. I have not led a perfect life, have been mean or hurtful to others. My pain is natures way of creating balance in the universe and the Self. 2) Look at pain and suffering as a gift, and not a curse. Allow it to give you the ability to feel compassion when you see others suffering, because you can relate to the pain. This should result in not treating people in ways that you don't want to be treated yourself.
Some people are not so fortunate. Having never suffered, they live their lives blindly contributing to all the misery in the world we currently see going on. Some people never get a clue that when they cheat, they are stealing from someone else. When they feel entitled and are greedy, many people go homeless and hungry. When they gossip, they hurt not only the target, but innocent people who love the target. That when they slap or neglect their child, they are contributing to the next generation of abusive, neglectful people. That when they act violently, they destroy human lives. That when they dominate and oppress, they turn people into slaves. Many people we see today in the world, simply don't care about the damage done to others on a daily basis. I am so glad I am not one of those people.
Whether you believe in a Higher Power or not, you will be the better person for seeing your pain as a gift. I would never wish my pain away. It has made me a better mother, a more loving wife, and a more compassionate person in general.