R.,
My son is 2 1/2 and this time last year we were battling a sinus infection that would come back as soon as the antibiotics stopped. It started last May, the begining of July we saw an ENT and she gave him orapred for like 5 days and we continued the antibiotic until he has his adnoids removed Aug 7. The orapred was to help shrink the tissue known as adnoids at the back of the sinus cavity, so his sinuses could drain, and he would be more comfortable. The antibiotics were for obvious reason-to keep the infection down before surgery. We did blood allergy testing while he was under for the surgery....and he has TONS of allergies...
That wasnt the first time he had been on orapred-he has reactive airway and needs them to help his lungs relax when that flairs up....and he has taken an oral steriod a couple times for allergic reactions....
But the point of my long post is that yes I think that you should try the steriod, but that I would also see a pedi ENT. I recommend Karen Hotchkiss, she has offices in tampa and brandon, she is part of Tampa bay ENT...she came highly recommended to me, AND removed my 2 year old (then 17 months) adnoids, and my 4 yr old (then 3 yrs old) LARGE tonsils and adnoids... ###-###-####