Thank you for all the suggestions! I tried the chin strap which didn't solve the problem. Practitioner suggested full face mask so just picked that up yesterday. It has memory foam and is pretty comfortable all things considered. I think it might be better for me but need a larger size. Should pick up the medium sometime this week when it comes in. The whole thing is quite overwhelming. And soon the time change will throw its wrench into the generally sleepless night . . . . . sigh.