Diazepam and steroids potential negative interaction

Patient: Is it ok to take 5 mg. diazepam after getting a corticosteroid injection earlier today? I am having trouble falling asleep and would normally take the diazepam on a rare ocassion I have trouble sleeping. Thank you

Symptoms: I have been having strong allergies both respiratory and skin. Doctor thought a steriod injection would be best. Now I cannot fall asleep and think it is related