I'm trying to pinpoint the cause of my low test..

I have a feeling that it was the dbol I took 10 years ago when I was young (20)..

It's hard to remember but I believe I was doing a 'pyramid' cycle (hey it was common back then) for maybe 6 weeks?

Of course I took no PCT, I know the dbol was real as I was definitely retaining water and I remember an increase in strength and slight aggression (gym determination style aggression).

I'm curious, could this be the culprit of my testosterone deficiency?