What Are The Uses And Side Effects Of Vyvanse Pills?

Ok im going to be honest i need to know if two vyvanse pills is too much they were both 70mg and i took one at around 8:30 am this morning and another around 1 pm and im scared to sleep i have been sweating sorta and its almost 3 am and i need to be up in 3 hours but im scared that if i fall asleep i wont wake up im scared i might have taken too much can i get help really soon please?