3 weeks post Septoplasty recovery issues (night sweats), should I be concerned?

I had a Septoplasty & Turbinate reduction 3 weeks ago. I'm having night sweats, cold hands, fatigue, and crusting (slight foul odor). I'm rinsing with saline, and am not taking any medication. I saw my ENT & GP Doctor of which a thorough exam was performed, including urinalysis, blood / hormone workup, of which only minor inflammation was found. They do not feel I have an infection. Why am I getting the night sweats and is this anything to be concerned with?