Med reactions happen. It's ok to be scared. I've been on at least 40 meds and had bad reactions to many of them (which is really unusual, don't be afraid of that) and what I've learned is that there is usually no way to predict what is going to happen. Risperdal and Seroquel are pretty different so hopefully you won't react. There is nothing wrong with slow increases. When I went on Seroquel I was really afraid of it because I'd had bad reactions to every anti-psychotic I had tried and so we did 25 mg increases every week or so. It took a long time to get to a dose that helped beyond making me sleep but I had no problems with it and have been on Seroquel for 7 years now, at very high doses for several years.

Going on meds is overwhelming at first and when you've had a bad experience it doesn't help but if you stick with it and get through the adjustment phases (and make sure you let your pdoc know when something seems wrong) you'll start to feel better.

I hope Seroquel works for you.