Glad to hear you're going well (or rather... not bad ?), Softfang.
I can't say I have any experience in stiches removal, but you can read the procedure here (you may want to start from page one though): http://www.emedicinehealth.com/removing ... ge3_em.htm
Note that they say :
"These relatively painless steps are continued until the sutures have all been removed. You may feel a tug or slight pull as a stitch is removed."
I've only had non-lasting stiches in the past. Once they started falling down, pulling on the remaining ones wasn't really hurting or anything. So be at ease, I believe the worst is clearly behind you.
If you consider it from a 'human anatomy' point of view, external pain is a signal sent to your brain from specific cells on your skin. These cells must have been over-stimulated the last days; even if they had too, they wouldn't sent as much pain signal as they would before the operation. Taking out a string out of there shouldn't be problematic.
That's it ! I hope this'll help a bit. Get well soon !