The lung specialist I saw in the afternoon suggested that an operation would be the best option for me but I'm still contemplating whether to go for the operation or not, because 3 keyhole cuts on my ribs and chest areas would leave visible scars and that would be so awful!

Without operation: 80% chance of recurrence.
With operation: <5% chance of recurrence.

Apparently, the CT scan showed that I have air pockets in both lungs, and I was advised to go for the operation to burst the air pockets and secure my right lung (which already had 3 episodes of Pneumothorax), lest both lungs give way together concurrently. But I'm not ready to be chucked back into the hospital so soon. =(