is it normal to have swelling 3 weeks post balloon sinuplasty.

I had ballon sinuplasty 3 weeks ago in both maxillary sinuses.I am still really congested and can't breath thru my nose. I'm taken steriods and am on antibiotics, I tried afrin one day and it still did not clear my sinus to breath. Could there still be swelling preventing drainage. Up to a couple days ago I still had dry bloody discharge. I've gone to my ent two times for follow up already.