Advice is as above, contact your Sleep Clinic advisor if you have one, or the consultant's secretary on Monday. Try sleeping half upright if possible. I have sleep apnoea and was issued with a Resmed Escape CPAP machine and mask which has always worked well. It depends which area of the country you are in as it is a postcode lottery. I believe in some areas you have to pay and in some areas there's a long waiting list for the machine. I'm lucky that my NHS Trust has given me the machine without charge as it could cost over £1,000 I think. It's about £120 just for the mask. I can't sleep without the CPAP machine as if I try, I wake up breathless and heart pounding every few minutes, and end up with a dull headache and feeling dopey all day. I have a Sleep Clinic review yearly and this time the nurse handed two new masks and told me to contact her if I had any problems. She said the equipment should have been serviced in May but they are not doing it at the moment due to Covid. Hope you get some help on Monday.