My son was on Seroquel and he got off of it. You have to decrease it slowly down to 25 mg or even half a 25mg tablet. After a few days if you are doing OK on 12.5 mg then take 5-HTP which you can get at a health food store. Take 200mg on an empty stomach about a half hour before you plan to go to bed and that should help you to get to sleep. (It is much more effective if you haven't eaten for about 3 hours before.) Our experience is that no matter how small a dose of Seroquel you have gotten down to, you will have trouble sleeping for a night or two when you quit if you don't take something to help. 5-HTP is a food supplement. Take 200mg for two nights and hopefully after that you will be OK as far as getting to sleep is concerned. The 5-HTP only works for about 2 nights in a row as a sleep aid and then the body gets used to it. (This is based on the experience of my son, you may be different.)
Geodon made our son more psychotic after taking it for about a week.
If you want to stay off medication, you should look up orthomolecular treatment of schizophrenia. It helps many people as long as they take enough niacin. Some people think they have tried it and it didn't work, but they only took 1 gram or so of niacin or niacinamide and that isn't enough.