Remarkable story here of Jane Alexander who was institutionalized for schizophrenia bipolar and cured it all with meditation alone.
http://intentions.wordpress.com/about/
Jane in the process of her healing journey Jane got rid of all of her medications.
You have identified a number of your issues which means that you are in touch with what your body is telling you. So many people these days are not. You are also young enough so that you can heal yourself and experience a life of fulfillment that is available to everyone on the planet - including those who have been abused.
Sexual abuse in childhood can cause all sorts of problems both emotional and physical. I know. I've used meditation to heal myself of PTSD from childhood abuse and adult tragedy as well. I suggest that if you go that route, find one that is based on spiritual grounding where you as spirit connect to the center of the planet and bring yourself as spirit into your body to heal yourself.
Manic episodes and even insomnia can be controlled through meditation as well.
Best to you in your healing journey.