Agree with Slitimage, dont mess around with dose.
It's important to remember that medications can take some time for it to work well. Keep taking your dose, or talk to your doctor about it.
It definitely can help with anxiety. Perhaps youd be interested in looking into safer things such as supplements. Inositol is good for anxiety however it is different for everyone and unfortunately can have side effects. Nothing life threatening I believe but it can cause things like headaches or even nice dreams or not so nice dreams. For me it made me too drowsy and combined with my seroquel it just makes me too drowsy in the mornings so I dont take it every night. But it does make me dream which I like.
Another vitamin is N acetyl cysteine that I find isnt too bad.