Be sure you eat enough food and drink enough water. Take a good look at how well you took care of your body that day. Adderall has a way of keeping you going normally no matter how you treat yourself -- until it wears off ...
If you can't find a fairly basic reason for your symptoms, you should call your doctor about it. I have found the following to be reasons for feeling like 20 kinds of crap when my meds wear off:
Did you skip dinner and go straight to sleep? Did you skip breakfast and take your meds on an empty stomach? Did you stay up late and get up early? Did you drink 8 glasses of water? (ok so at least 6 *grin) Did you organize your sock drawer, pay your bills, clean your car, the bathroom, and mow the yard all in one day just because you could?
Welcome and good luck! Let us know how it goes, ok?