The reason I ask is that there are many different reasons some people have trouble using CPAP. Most of them can be sorted out. Here are some potential reasons and fixes:
The mask is uncomfortable. Tighten or loosen the straps and reposition the hose, if that doesn't work try a different mask.
The mask leaks air and wakes you up. Tighten the straps and reposition the hose, tucking the hose under your pillow can help keep it from pulling to one side, if that doesn't work try a different mask.
You have trouble moving air through your nose. Use nose sprays, if that doesn't work, try a heated humidifier, the heated part is very important.
Air blows out of your mouth and wakes you up. Try using a chin strap, your home care company will have one. If that doesn't work, try the stuffy nose approach above.
If you've worked through all of the above approaches and you just feel like the pressure is too high, ask your sleep specialist about BiPAP or using a jaw advancement device with your CPAP and lowering the pressure.