I was prescribed Lexapro for major depressive disorder and anxiety. Dr wanted me to start at 5 mg and work up to 10 in a week or so. I took my first dose last night, and I feel awful. My head is heavy, heart is racing, I feel like I can't breathe, I'm shaky. I honestly feel like I'm having the longest anxiety attack ever. My mind is going a million miles an hour and I can't keep myself calm. Has anyone else experienced this? If so, does it go away? I need it to. I can't function like this. I'm scared, and it's scaring my toddler...