My test levels were 8.7 ng/dl 11 years ago, is it time to get re-tested?

I came across a testosterone test from 2015 when I was 20 and at the time I thought nothing of it but I came across it again on my medical app and it showed 8.7 and the line was literally on the 'low' line (within normal range).

I've had life long issues with tiredness and have always struggled to put on muscle even though I've been training relatively consistently for nearly 10 years now.

Should I get another test done on this or am I just being paranoid?