After A Root Canal In My Upper Third Tooth On

After a root canal in my upper third tooth on my left, I believe it's the #11 tooth. I experience swelling in my left cheek, down to the bottom of my jaw area. This only happen when I drink any drinks other than water, after a few days when drinking water only the swelling goes down and the cheek is back to normal. The dentist re did the root canal to be sure all was done well and took full facial xrays and said they found nothing wrong with the root canal. Now, there is a problem somewhere even though there is no pain and swelling only with healthy drinks. Again none with drinking water. I do not drink alcohol nor hardly any sodas, just health drink, Lattes and juices.