Hi there , Thanks for reaching out & for your question! We are not healthcare professionals & cannot provide you with medical advice...only speak to our personal experiences. That being said, I can share (again from my personal experience) that I too have had extend long periods of time being essentially almost pain free. I can however attribute mine to my IUD. I was nearly symptom free for 3 years when I first got the IUD, but over the past few years unfortunately symptoms have once again returned...not as intense thankfully.
Fingers crossed you continue to be pain free! I wonder if it may be related to a change in hormones? Will you do us a favor & keep us posted?