What can I do to adjust my retainers from constantly rubbing on my tongue causing sores and swelling?

I just started tray two the other day, I find with both trays even with my doctor adjusting or smoothing the edgea of the trays it's hard to keep them in as my tongue is so swollen and has sores from constantly rubbing on the bottom, its worse when I talk. I take on the phone all day for work. What can I do to adjust them or keep my tongue from swelling?