Hi Lyn and welcome to the forums!
I think, with all meds, they say you should give them a good month at a therapeutic dose before trying something else. That is when the benefits will likely be seen. But I don't know about those side effects that you have been experiencing. Sounds kinda scary with the vision problems. I was only on seroquel very breifly for sleep, so maybe others know more about it and the side effects that can come with it.
I hope that stuff goes away and that the seroquel starts working great for you!