insomnia 10 hours in 4 days

hi everyone. I have Mytonia Congenita and a lot of over conditions, arthritis etc. One of those is sleep apnea, which I wear a CPAP machine for. However the past 6 months I’ve had horrific insomnia! I’m talking it’s so bad I’m getting about 4 hours in every 24! I honestly don’t know what to do anymore, I’m so tired I feel physically sick! Thanks, ChelB (drs have gave me melatonin)