That is correct, doctors are very concerned about how quickly the PSA rises. The thing is, You need more tests to see whether or not your PSA is actually rising or has it just bumped up and will bump back down. Your original PSA of .9 was quite low. A year later, 2.2 is much closer to normal. Yes, in a year it went up 144%, but that was starting with an unusually low .9.

See what your next test shows. Your PSA at .9 was quite low, A range of 1.11 - 1.28 is more normal for your age.

Here's a breakdown by age group:
40-49 years: ≤2.5 ng/mL
50-59 years: ≤3.5 ng/mL
60-69 years: ≤4.5 ng/mL
70-79 years: ≤6.5 ng/mL
These values represent the upper limit of the "normal" range for each age group,

As you can see, you were way below the upper limit of normal.