Bile duct stents

Hi Everybody, 

My Mum has Bile Duct Cancer and has been told if she has Chemo for 6 months!!! she could survive around 12 months in total.....She had her Gallbladder removed in 2016 and Cancer was found in the Gallbladder then with in that week she found a lump in her breast and it was there also. She had a mastectomy followed by chemo plus 12 months of Herseptin. She had a stent put in for the healing process. This stent as far as we know was never removed because the breast Cancer seemed to overtake everything and was overlooked! She has spent 2 and a half years complaining about stomach problems and bowel problems....6 weeks ago she turned jaundice. They said she needed a stent in to open up the obstruction. They then found the Duct Cancer, and in the liver. So was told she needed chemo. Last Friday she had the plastic stents replaced with metal ones. Because she was due to start Chemo on the Monday 27th May BUT she was too poorly and her BP was too low...Now due to start the Chemo this Monday 3rd June. Problem is, she is still in pain and feels there is something wrong with the new metal stent. 

I would like to know if anybody has had plastic stents replaced with metal ones and roughly how long the recovery process might be? Just to add when she had the plastic ones put in to help the jaundice she recoverd withing a few days...Could somebody please point me in the right direction for some answers

Thanks for support Jo