Your current symptoms are unlikely to be due to lexapro.
The most likely cause could be migraine, where one could get headache, dizziness
and sensitivity to light as you have.
You could take rizatriptan
to relieve the current symptoms.
If symptoms persist, you could consult a neurologist
Wishing you good health,
Dr Sudhir Kumar MD DM (Neurology)
Senior Consultant Neurologist