2 months and one week.

At 9 weeks you have completed 2 months of pregnancy. The issue with all of the charts is that people think you count the month at the beginning of the weeks listed. For instance during your first week of pregnancy you are not 1 month pregnant but you are in your first month of pregnancy. If you have a predictable cycle that averages 28-30ish days you could just count out from your last period.

You’re in the beginning of your third month

Divide by 4. So 9 weeks is 2 months 1 week

Close to the end going into your second

First trimester