As i was sleeping my head became very ichy, as well as my ears. i woke up and found random welts on my legs, arm and back. what's going on?

Urticaria: It sounds like you're having a systemic allergic reaction. (hives, urticaria). If you've taken a new med, it is suspect. An insect bite can cause this. Beyond those 2, there is a long list of suspects that can take a long time to isolate. You will need professional help. There are treatments that will help you to feel better meanwhile. Good luck!