Anxiety Support Group
Anxiety is a physical condition marked by intense and persistent feelings of distress, fear, angst or dread. General anxiety caused by routine day-to-day stresses usually passes quickly and is experienced by almost everyone at one time or another. However, such feelings that linger over time and are very difficult to cope with, and which lack a clear cause, may indicate...

If this is a new stomach issue, then I would let your psychiatrist know about the side effects. Good luck!
I am waiting to see a psych, just working with my gp at the moment
Also, PLEASE consult your doctor before changing the doses around, even if you're changing it for one day. You could call his office and leave a message, even on weekends. It is not a good idea to "make your own dosing" if you know what I mean. These drugs are not meant to be taken "as needed". They are meant to be taken at a steady dose, and on a daily basis, according to what your doctor has prescribed. You can always call him and ask if you could take less, more, etc. You don't have to wait for your next appointment to ask him questions about the side effects.
Again, please check with your doctor (and hopefully your psychiatrist soon) about the doses you are taking and do what the doctor says. Good luck.