I am trying to conceive and learning all this now, but I think 7 months is around 27 to 30 weeks of pregnancy. It must be such an exciting phase to reach!
I just delivered last month and I remember 7 months starts around week 27. It's when the third trimester begins and you start feeling those heavy kicks!
Typically, 7 months starts around 27 or 28 weeks, marking the beginning of the third trimester. But please verify your exact gestational age with your gynac according to your ultrasound scan reports.
Simple calculation is that 7 months means you have completed 26 weeks and are now running in week 27 to 30. No need to buy expensive trackers, just keep a manual calendar record.
At my hospital, the doctors always mapped my pregnancy in exact weeks rather than months to monitor fetal growth. I suggest checking your patient portal or asking your consultant for your exact week-by-week progress.