I'm going through very stressful times at work and went lexapro. I'm needing to also take sleeping medication because I've been having such bad insomnia. Unfortunately the sleeping pill is only lasting a few hours before i wake up at 500 with racing heart and almost like panic attack. I suspect it's because my cortisol levels are so high then but cant keep this up. Feel like my heart will explode. Help please! I have to get this under control to go to work.