I went to the doctor on friday and was treated for an allergy; a steroid shot, a nasal spray and since then i have ran a steady fever of 100- 100.2.

Perhaps not allergy: Since none of those medications should cause a fever, it's possible the diagnosis was wrong and you actually have a respiratory tract infection. Symptoms are very similar between the two disorders, except fever not usually present with allergies. If not improving in next few days, give doc a call back and let them know that you have fever as well. In meantime, get lots of rest and fluids.