Well, as far as I know, Gothic is a fashion choice. Wiccan is a specific spiritual path, kind of like the Methodists are a specific kind of Christian.
I'm way into all this spiritual stuff. And I'd be happy to talk with you more about karma, reincarnation and how we incarnate into this world.
Just know that it's not so simple as bad actions = getting a disability in your next life. You didn't do anything wrong to be made autistic.
This is a BIG question. Basically, it asks why? Why do we suffer? Why do other people get things that they want and we seem to struggle endlessly? All major religions ask these questions. It's universal.
In general, the pagan way of thinking is that when we come into this world, we do so on a specific frequency. So part of who we are is dictated by who we were in the last life. So, you die, and when you die, you bring with you the essence of who you are. So in the next life, when you come into a new body, you bring that essence with you. If you are heavy with guilt over a great wrong, you bring guilt. If you are working on learning how to love whole-heartedly in your last life, you will bring that with you, too. So, if you find yourself with big challenges in this life, it can be helpful to consider that this is part of a larger story. You are struggling now, but your essence is learning and growing through that challenge.
It's kind of like The Empire Strikes Back. It's dark and the end seems lousy. But its the middle movie. You can't understand how great of a movie it is without watching the rest of the original trilogy. Luke Skywalker didn't loose his hand because he was bad in Star Wars, A New Hope. Luke brought his impulsiveness and his desire to fight evil in from the first movie and that led to him going to fight when Yoda asked him not to, but he lost his hand because Darth Vader cut it off. It's not karma. Its just physics.