Ok I Saw Dr Oz Tonight And He Gave This

Ok I saw dr oz tonight and he gave this out . I have been diagnosed with sever sleep apnea - got CPAP machine and tried four masks - -all made me chlostrophobic . So I don't do anything . He says sleep is so important - I'm also overweight . 5'2 192 lbs - if I lose 50 lbs will the apnea go? What else can I do? I wake up every 2-3 hrs but go back to sleep easily but I'm getting tired some days in afternoons -