Invega and Sertraline and Prazosin all have nausea listed as a side effect. Invega also has a side affects of tremors (shaking). Please check back in with the person who prescribed these medications for you and let them know that you are not doing very well on these medications combined. Maybe they will be able to sort out a more comfortable treatment plan for you.

If you find that you are breathing too fast then this alone will affect what your body does. Try and breathe deeply and do something to distract yourself.