First of all, not sure if you qualify, but
http://www.janssen.com/company_pap.html this is a link to a patient assistance program. Something to look into for the Invega medication if that is something you were trying to stay on. Second of all, did your psych nurse give you any instructions on when it is appropriate to call her? You have the number. This already says alot about her as a nurse. If she has expressed that it would be okay, I think even the quick call to hear her might be enough to help calm you down. Mind you, call after call wont get you anywhere but backwards. Its just hard to say for some of us what to do because each doc,T,nurse,etc has their own rules with contact with patients.
In the meantime on deciding whether to call or not, you may at least get a notepad and start writing down what you want to talk about come your next visit. Maybe writing it down will help.