@Roberta,
If you tell me which steroid it was (here or PM), I can research it for you.
From what I just read about steroids in general, the worry is in long term overdosage. Short term overdosage doesn't seem to have any serious side effects.
They say to watch for increased acne or facial hair, menstrual problems, impotence, or loss of interest in sex. (At our age, those aren't side effects, that's a way of life!)
You might want to confirm what your doctor said and speak to the pharmacist about it when you pick up the order. I do that with BBB's medications. The pharmacist has caught a couple instances where she was getting too much acedamedifin with all the prescriptions given by her various doctors.