İs it normal to have nasal congestion three weeks after sinus surgery?

I had a unilateral sinus surgery and bilateral turbinate radiofrequency 3 weeks ago. I have been rinsing my nose three times a day and I am using a nasal moisture spray three times a day although it passed three weeks and I have used all the medications properly, my nose is congested and some bloody mucus. I am afraid that my surgery is failed or am I too impatient about that? am I experiencing a poor healing or everything is normal at that period?