Can sinus congestion after septoplasty cause complications?

I'm a few days post-septoplasty to correct a deviated septum. I'm irrigating frequently, and using medicine the surgeon prescribed, and overall doing what I'm supposed to. But I do feel like I have some serious mucus buildup in my sinuses that I have no way to get out. Beyond using saline spray is there anything else I can do? I understand this build up can be annoying but can it be harmful or cause issues (with not being able to blow your nose)?

No doctor answers yet