I just recently started doing PE and i decided to start on a day where i havent slept for a couple of days and i took a lot of an adhd pill called vyvanse because i was trying to fix my sleep schedule. I am just starting with the beginner routine that is recommended. The problem was that day i had a hard time getting hard so i just did the exercises at a lower erection level. I thought everything was fine but later that day i went to try to get a 90-100% hard on and i couldnt even while watching porn. I dont know if it was from being overly tired or what but i still havent gotten a full erection and its been 2 days. Im only 18 and i usually have no problem doing this at all. If someone can tell me whats going on that would be very appreciated. 
