Anyone ever had revision surgery on only one eye?

I got double eyelid incision and eye surgery, but less than 6 months later, one of my eyes is starting to swell, so they said they'd do after-sales service at the hospitalㅠ
 But if I get another surgery on only one eye, how long will it take for the swelling to go down?
 The residual swelling went down after 3 months when I had the first surgery on both eyes. The hospital said it'll be similar to the first surgery, but
 I'm thinking about taking graduation photos in two months and then getting another surgery,,ㅠ
 Right now, it goes down when I'm tired, and it's fine normally, but it won't go down completely in two months, right,,?