I'm pre-FFS at the moment, with about 3 months until my procedure.
Re the nasal blockages, this is one of the things that I will have fixed during the procedure. While it was something I was born with, according to my surgeon, this can happen during a rhinoplasty depending on the degree of change. The procedure to correct mine is called a septoplasty ( and costs more, of course ).
On the cosmetic side of things, I'm only doing a rhino and chin implant. The chin implant is safe, and can be modified / removed later. Though I am making a substantial change to my nose, removing a hump on the bridge and actually making it slightly concave. But staring at photos of the proposed changes, I am happy with them 🙂