I had a huge exam yesterday, so starting on Thursday at 11:30 am, I took a 50mg pill to help me study. I took another 50 mg pill at around 7 pm. I was feeling fine, but I couldn't sleep the night before my exam. The morning of my exam on Friday I took another 50 mg before I left. Over a 20 hour period, I took 150 mg vyvanse. I have been having chest pain, shortness of breath, rapid heart rate. I went to the ER today to get it checked out and I didn't tell them about the vyvanse.