I had a panic attack 3 days ago after missing a dose of my anxiety meds (20mg Lexapro). I’ve never had a panic attack before so it was really scary to me because I didn’t know what it was at first. ever since that panic attack for the past few days I haven’t felt the same. My heart will start racing when I lay down. And I’ll wake up in the middle of the night feeling like Im about to have another panic attack but I am able to control and suppress it for the most part now. I’ll still get shaky and out of breath.