I had my operation 5 weeks ago. Loss of sense of smell after sinus and deviated septum surgery?

i had my operation 5 weeks ago...and i got the packing removed after 8 days since the surgery..i breathe well now....but my sense of smell has been decreased..for the first two weeks i wasn't able to smell or taste anything at all....so i told my surgeon he gave antibiotic and oral cortisone for 5 days... after that i start to get better now i can smell and taste a lot better but still it is not 100% i can tell its 60% ...and its been 5 weeks till now is it fully returned ?? i'm so worry please help