Daisylouo, it sounds like to me, that your cpap pressure is not high enough, or mask not sealing properly, or your opening your mouth if using a nasal mask. On my experience this is the second time in my life I tried CPAP, ( back then I had an AHI of 89 and was very severe OSA, almost on deaths door ) I first tried it in 2004 on a pressure of 13 with a full face mask and could not stand it, I found it claustraphobic. I then had a UPPP operation in 2005 which is significant throat surgery to remove my large tonsils, uvula, adenoids and mouth palate cut back and altered to open my narrow airway. This reduced my snoring for a couple of years then it came back, I snored like a jack hammer, I revisited a sleep specialist in 2015, had another sleep study which found my AHI was now 43, better but still severe, I am also a mouth breather but did want a full face mask, so I tried a philips respironics nasal mask with the comfort gel seal and a seperate chin strap to keep my mouth closed and it seems to work well. You might need a chin strap to shut your mouth ( as snoring comes from an open mouth and obstruction in the throat and a rattling uvula as well ) and your pressure raised, even after all that I still require a pressure of 12, it takes a lot of getting used too, I am glad I had that useless dangly thing called a Uvula cut out, it caused a lot of problems, it used to get inflamed from my severe snoring and dangle down and hang on my tongue which gave me a horrid choking feeling when I swallowed.
Your pressure is obviouly to low.
You might also check out the Fitlife mask.
It sounds as if that particular mask would be almost tailor made for your needs.