greetings friend,yes you can be premenopausal as early as age 40 my friend. Adderall
is not known to make your periods irregular. I do not think this is anything urgent and often people will have irregular menstrual cycles for several months. I do not think he needs to see a gynecologist unless this persists for 3 months. You might want to do another pregnancy
test just to make sure that the first one was not an accurate. Because the best and most likely cause of not having a period still is pregnancy. Have a great day.