I'm dealing with some post partum anxieties with my second baby. With my first I had horrible post partum anxieties but refused to take meds and suffered for months! This time I agreed to meds and started 37.5mg of Effexor. I'm on day 3. Feeling very nauseous and fatigued all the time. Plus my anxieties have worsened. Can anyone tell how long the initial side effects last and when should I expect to feel better?