There is usually still swelling in the nose after 4 months from rhinoplasty. The amount of swelling at this stage depends a bit on whether your original surgery was an open or closed procedure. Also, if more work was done you'd likely have more swelling as well.
Either way, it's a bit early to do a revision at this stage as you wouldn't want to prematurely do a revision when your nose is still evolving.
Generally it takes a year for all the changes that can occur to occur following a rhinoplasty. If at the end of a year you are still unhappy communicate that to your surgeon or get a second opinion
You still have a good amount of swelling and the type of skin that you have may retain the swelling for a long time. One way to speed up the resolution of swelling and the scar tissues is injection of small of cortisone, if you surgeon agrees and is comfortable doing it.