3rd day on lexapro. I woke up tired today but then after a few hours I felt like shortness of breath. I tried not to panick, but it felt like I couldn’t take a whole deep breath. I think I ended up hyperventilating and my hands became stiff the way they do if they fall asleep. If I clenched them they’d go right back to being stiff. I called the paramedics and they checked me out. Everything was normal. My heart rate slightly elevated. Did I just have a panick attack or is this something more serious? Should I get my heart checked out ??