I am sorry you are hurting. It is horrible that this happened to you.
But, do I think that people who are deformed, or have a disability, or name your condition here were "bad" in a past life, and so now, they must be punished? No. Not necessarily, no.
If there is a reason, then there are as many reasons as there are people on the planet. If you chose this path, only you can know the reason why.
I utterly reject the idea that people who were "bad" must be forced to navigate through life with a big scarlet A on them so that they are properly punished and the rest of us can feel superior and proud of ourselves that we were "good" and so much better than them.
I think, rather, that we all take a huge risk upon ourselves, simply by being born into a planet where people are known to be cruel, reckless, selfish, greedy, and so on. All of us face this risk. All of us. Some are lucky, some are not. There is no "why".