It sounds like the start of a RI. No discharge is a good thing.
Go to a plant store, or pet store and get a bag of sphagnum moss(around $5), soak a large hand full in warm water for a few minutes, then RING OUT ALL THE WATER, so it is damp but not wet, when you squeeze it no more water should drip out. Place some in your snake's hide box and spread the rest around the cage, repeat this every day or every other day, depending on how fast your moss is drying out, the moss usually stays moist for about two days, Don't let the moss dry out for to long a couple days in dry moss and that can make it's RI even worse. Also crank your heat up to 95-98 degrees. Keep this up for about two-three weeks, if it stops holding it's head up, and the heavy breathing stops, try to feed it a small meal. If you can't get moss you can try the same with paper towels. I had 3 balls fall victim to a RI this year and all have recovered beautifully. Good Luck!
Jay Cassidy
cavemanreptiles.com