I have been on Lexapro for 15 days now. Initially began @ 10mg then increased to 20mg for one day (massive migraine) back to 10mgs. I noticed on day 12 my insomnia returned and has escalated to panic attacks while sleeping. Has anyone had this happen to them on Lexapro? If so, did you wait it out, change meds, decrease dose... please share your experience. Three days and 10 hours of sleep.