Hi, I'd like to help you with your question.
It takes up to 6 to 12 weeks for the full benefit of Invega to be seen.
It may benefit you to ask your doctor for another medication such as Ativan to take the edge off your anxiety until the Invega starts to work for you. Then you can wean yourself off the additional medication when the Invega starts to help you.
Have you also considered therapy and self help as a way to cope with your symptoms? If you have not, you may find that therapy, even once a week, will provide you with support and guidance in your recovery. To find a therapist, you can talk with your doctor for a referral or you can search on line at http://therapists.psychologytoday.com/rms/ (look towards the bottom for a link to Canada).
If you find going out to see a therapist too difficult, here are some resources you can use at home to help:
The 10 Best-Ever Anxiety Management Techniques: Understanding How Your Brain Makes You Anxious and What You Can Do to Change It by Margaret Wehrenberg
The Anxiety & Phobia Workbook by Edmund J. Bourne
The Cognitive Behavioral Workbook for Anxiety: A Step-by-Step Program by William J. Knaus
Self-Coaching: The Powerful Program to Beat Anxiety and Depression, 2nd Edition, Completely Revised and Updated by Joseph J. Luciani
You can find these books on Amazon.com or your local library may have them for you.
I hope this has helped you,