So, Eliza, I wonder if you are giving Fiona's good thoughts some reflection. Shut 'er down, then come back on lowish and slowly ramp up. Since you have four programs, this process would be repeated three times after your first attempt.... the concept is sound. Find out through experimentation, and write down NOTES as you do this, reflecting on what you experience, the numeric pain levels if you can stomach tracking it that way, and record your thoughts moment by moment, attempt by attempt.

THEN, it would be recorded recollection of your experience you could copy to take in to your doc..... assuming there is a follow up appointment to show empirically your data. Sure, pain is subjective, but you need documentation at some point or another regarding your good efforts at making proper use of the device.

Pen and paper in hand, get ready and go,
Praying for you my friend,
Mark56