Purification on Stage 8

Hi

Any thoughts on why and how to deal with strong purifications in stage 8?

I believe that I am comfortably in the later part of stage 8. With a bit more consistency reaching an equanimity I would be stage 9. Frequency see internal lights, most sits, Nada sound often and have physical pliancy.

I sit every day for an 60 to 90mins, also a 60’mins of walking meditation. Frequently I do more time. “Meditating on the mind”. I only follow TMI for last few years, so have mainly been working on Samatha and now feel like I am working on Insight practice, per TMI, last few month’s ..

Recently I have started experiencing the strongest purifications. I had them in previous stages, bringing back lots of difficult memories. Mainly related to medical issues, anxiety on this topic is one of the reasons I started meditating. At the same time I have lots of involuntary body movement, arm flying, wincing, pains etc

I guess the advice is to let it come, let it be and let it go. But I see no reference to purifications in stage 8? Have I dropped back down? Many advice welcome, thanks