Yesterday, I took my prescribed 70mg Vyvanse with my new converted 10mg Lexapro (formerly Prozac 20mg) - then last night without thinking clearly, took another 40mg Vyvanse with 5hour energy to stay awake and work, and immediately my heart was racing. This AM, I took my prescribed dose of 70mg Vyvanse and 10mg Lexapro, then an hour later took a 5hr energy on the way to the gym, worked out for an hour, and now my heart is back to racing, I'm nautious and dizzy, can't think clearly, and can't nap because my heart is pounding to hard.... what should I do?