Advice on Upcoming Reconstruction Surgery

i had a gun shot injury in march 2011 with a lot of pellets scattered around my face. The emergency treatment didn't take out the plastic cartridge which i had in my face for 9months. When i went for first reconstruction in india, titanium plates were inserted and the infection before then was so strong my nose ran continuously and there was a foul smell. 2months after that surgery, i had a boil on the line the incision was made and it has since discharged pus and blood, it also resulted in ectropion. The foul smell and runny nose reduced but i feel a lot of pain from the plates and the movement of the pellets is quite uncomfortable. I'm meant to have another surgery at Johns Hopkins Next week and i'm kinda scared. I just completed a dose of Levofloxacin, it was prescribed after having a wound swab done. The doctor plans to use medpor implants to replace the titanium mesh to build my orbital floor. He says my right sinus is blocked and he'd have to do a sinus surgery to drain it to clear the infection and also help me breathe thru that nostril again, he also wants to use an implant for my cheek as i have lost my cheek bone. A scar revision for my cheek will be done too. He says all this can be achieved in 1 surgery. I dunno why i'm worried. Please docs, what do you think about this treatment plan? Thank you.