I had endoscopic sinus surgery a week and a half ago (age 58, 160 lbs). I had a lot of dark purple discharge (I assumed it was from the blood mixed with the dissolvable packing. A couple of days ago, I started to feel increased pressure on the right side. The discharge also began to smell like ammonia. I blew most of that out over the next day, and felt better, but now the pressure and smell in the discharge are returning. Monday I go back for my checkup. Is this normal? What causes it? Is this something I need to handle before Monday if it doesn t get worse?