Hi. I am having strange feeling in back of throat while in sleeping position. Lots of deep snoring where I never snored before. Feels mucusy and like it wants to close up. It's making me anxious because I think it's going to block my throat so I won't be able to breathe. Any thoughts on what this could be. I should tell you I am on Cancer trial drug. I take 3 pills twice a day for recurrence of ovarian cancer. First diagnosed in 2000. Stage 3 ovarian had complete hysterectomy and debunking. Thanks. Kris f.