Rhinoplasty-nose got more swollen?

5 weeks post op. at 3 weeks a lot of my swelling had went down and it seemed like my nose was reaching a pleasant shape and size. however , over the next week and this week , my nose has gotten more swollen. Even bigger than it was before I got surgery. I'm not sure if it's connected to constant sniffling, or excessively rubbing my nose while washing my face , or a sunburn ??