Bruce
WOW!!!! You are going through a lot.
You should definitely contact your doctor or go to the ER to get a CT Scan and a KUB done. I have many problems with my kidneys and stones are definitely one of those. I've been getting stones for over 25 years. I've also been stented more times than I care to remember.
The only thing close to the "noodle" description that I had was puss and I was told it was normal to have that with a stent after having a cysto. They did a urine test which was negative for infection as it was a concern to me because it looked like puss and stringy.
When a stent is in place it will aggravate the bladder wall and kidney which can cause pieces of tissue to be passed when you urinate.
There are many different stent sizes..I learned this the hard way. I've had stents that were way to big for me and they hurt with slightest movement.
My new urologist uses a smaller stent when I have to get one put in.
It's possible the stent you have might be to big for you, which might be adding to the pain and tissue pieces being passed.
As for passing pieces of what appeared to be glass..Could it have been pieces of the stone? Most stones are jagged like glass and are crystallized due to the formation of the type of stones you are producing.
Do you still have the pieces? If so I'd bring them to the doctor and ask him what they are? (at least for peace of mind sake)
I hope nothing went wrong during the procedure.
Again the best advice I can give you is to see your doctor or if the pain gets really intense go to the ER and take it easy, don't do any heavy lifting and drink plenty of fluids to keep the pieces moving, also walking a little will help move those little buggers!!
Take Care of yourself...