So this is what has been happening to me these last 2 months. This agonising pain had kept me awake and really uncomfortable in any position.

With a clear and extensive explanation today, the orthopaedician gave some enlightenment to my situation.

So, there you go. It's old age!! That's what's causing the extreme pain!

Hopefully, as what was recommended, rest and back exercise will bring the disc back to its position...