I recently started using a BiPAP after completing a titration study. The tech and doctor said that in the study, they were able to get my AHI down to 3. However, with the BiPAP at home, my numbers have been significantly higher. As high as 30-40, but most recently down to 15, as they have been adjusting setting. Is this common that it still takes adjustments and time? I'm falling asleep fine with the mask on and feel comfortable in bed with it, but I end up waking up halfway through the night, from what feels like an apnea. Have others experienced something similar?