My numbers and pressure change

A quick question for those who know more than me. My machine has been set on 20/16 BiPap and I have been having some problems.
My numbers were obstructive airway 13.4
hypopnea index of 3.4
AHI of 15.2
ibratory snore index of 26.6
These were the high numbers. They were usually lower. My pressure was recently increased to 21/17 with the following

Average obstructive index of 3.1
Average hypopnia index of 1.9
Average AHI of 5.0
Average vibratory snore index of 1.4
These latest numbers are only four days of data.

Are these numbers good or should I see if the therapist wants to go up?
My sleeping has improved since going on bipap and I feel better just not as good as I should.

Thanks Gerry