My 93 year old mother has had a prescription for Lexapro for several years. She has not used it for quite some time. Last week she had a retinal bleed and was feeling nervous or shaky so we gave her a tablet. That helped with the shaky feeling. It took several days to resolve the issue with her eye and she continued to feel shaky so she has taken a pill for four or five days, today we did half a pill. Over the last three days, she has had an upset stomach. What would you suggest?